Music identification app Shazam has announced big feature updates to its iPhone and iPod touch music discovery apps. There are now customised settings for ‘tagging on start-up’ make the process of identifying a music track faster, a new UI, the ability to search for ringtones and videos on iTunes and better video. You can also share tunes you find via Facebook and Twitter. Shame it doesn’t own its name on Twitter then.

When I read Twitter CEO Evan Williams post tonight about the state of Twitter from a mobile perspective, the first thing that jumped out at me what that Twitter for Android, an app Twitter worked hard on, isn’t even in the top 10 most-used apps for the service. But Williams also used the post to whip out some impressive numbers. Chief among them: Twitter now has over 145 million registered users (though presumably less than 150 million, or he would have said that). And there are now nearly 300,000 registered apps in the Twitter ecosystem. The latter number above is technically the number of registered OAuth apps in the ecosystem (and includes multiple instances of some apps). Twitter made the switch over from basic authentication to OAuth a few days ago, leaving behind some apps, such as the old Tweetie (which was reborn as Twitter for iPhone). Williams says this number of registered apps has tripled since their Chirp conference — which was only this past April. Other big numbers thrown out there by Williams: Mobile users have jumped 62% since mid-April 16% of all new users to Twitter now start on mobile (it was 5% before Twitter started doing branded mobile clients) 46% of active users use some sort of mobile Twitter experience 78% of people who interact with Twitter still do so through twitter.com — though that number includes people who use more than one app m.twitter.com is the second most-used Twitter interface at 14% SMS and Twitter for iPhone are tied at 8% Lastly, he throws in that Twitter’s Promoted Products (read: their first big monetization pitch) has “exceeded our expectations.” No word on if that means Twitter has turned a profit, but that seems pretty unlikely. Still, revenues are undoubtedly growing. CrunchBase Information Twitter Information provided by CrunchBase

Are you addicted to Twitter? Do you have an iPad? Even if the answer to both is “no” right now, after you see Twitter for iPad, those answers are going to change — quickly. Yes, the wait is over. Launching tonight in the App Store is Twitter for iPad — the first official native iPad app from the company. We all knew it was coming (Twitter even said so a few months ago), but it has been a long wait. It was definitely worth it. Like most people, I wander into hyperbole from time to time. But it has now been a few days since I first played with Twitter for iPad, and I still think it is hands-down the best iPad app out there. It’s that good. With all due respect to Reeder, Instapaper, Flipboard, and Pulse, this is now going to be my go-to app for just about everything related to reading news. It’s simply such a great experience for reading tweets — and more importantly, reading the links your friends share. What Twitter has done is create an amazing user experience for reading information. This is thanks to an intuitive user interface that layers on top of itself. So, for example, if I click on a link in my tweet stream, I’ll have a new layer that rolls over to show that webpage in a customized browser window. If you’ve used Flipboard, it’s somewhat similar, but better because it’s much easier to go back to where ever you previously were before you clicked the link. You simply swipe something to the side to move it temporarily or swipe it again to get it off the screen (in portrait mode anyway, where there’s less space). Something else that’s awesome: when you highlight a tweet by clicking on it, it’s now pinned to the top or bottom of the screen as you scroll through your stream. This is great if it’s something you want to reference. A lot of thought has been put into these type of saving state actions within this app. It’s simple to save a draft and go back to it, for example (much easier than with Twitter for iPhone). Or to reference one of these pinned tweets in your own tweet. There are also some great new gestures that Twitter came up with for this app. For example, if you pinch-outward on a tweet, it will unfold to show you more information about the Twitter user. Better may be the way you can swipe down with two fingers on any tweet to see a full conversation in context. It’s the little things like this that make the app great — Apple-like, even. Overall, the app looks and feels quite a bit different from Twitter for iPhone (which Twitter built from Tweetie — developer Loren Brichter’s client that they acquired earlier this year). But Twitter’s Leland Rechis assures me it’s using all the same stuff on the backend. In fact, Twitter is now a universal app — meaning it’s one app that will work on both the iPhone and iPad, it will just look different depending on which device you’re using it on. Rechis also says Twitter started experimenting with some newer things on the iPad version that haven’t yet been brought to the iPhone version, but undoubtedly will. A great example here is that when you click through to a user’s profile page, you’ll see at the bottom a list of users similar to that user that you may like to follow. Rechis also notes the importance of the logged-out view — something Twitter worked on before the iPhone version launch. Twitter wants to make the service as useful as possible to people even if they don’t have an account. The idea, of course, is that they’ll hopefully sign up for one — and this app may give them the most reason to yet. When logged out, you’ll be able to see tweet streams based on hot topics. “ Tweets in general are not just what I’m doing, they have an incredible amount of metadata ,” Rechis says speaking to why they created this layering idea for the app. Almost 25 percent of all tweets now have a link in them, he says. This app is perfect for those tweets, and content consumption and exploration in general. Rechis notes that one of his favorite things about tablets is how they eliminate window management. At the same time, you need some way to manage all this information. He notes that Brichter’s original concept was stacks of sheets of paper that you quickly shuffle through. Other members of Twitter including Rechis refined that idea and the end result is Twitter for iPad. That’s roughly 750 words about the app — but you really just need to see it, and use it. It will definitely be my go-to way to browse Twitter from now on. It’s that good. Look for it in the App Store shortly. It will be a free download. Update : I should note that for some of these more advanced gestures, there is a slight learning curve. That said, you can do everything without using those gestures, so it’s not a big deal — it’s just icing on the cake. And yes, Twitter is trying to come up with the best way to teach users about these new gestures. CrunchBase Information Twitter iPad Information provided by CrunchBase

Online learning site Grockit is scaling up its leadership team after raising $7 million last May. Today it is announcing that it is hiring Roy Gilbert as CEO. Gilbert is Google’s director of user operations and policy, in charge of many non-advertising operations. He helped set up Google’s India operations and grew it from 20 people to 1,000, and was the first business manager for Gmail. Founder Farb Nivi recruited Gilbert, who will also be taking a board seat. Nivi will be president, chief product officer, and chairman. “I kind of look at him as our Eric Schmidt,” says Nivi, who came back getting hit by a minivan last year to keep his startup going and growing. Gilbert served in the military driving nuclear submarines, and yes, he was a boy scout. But he also comes from a family of teachers, and he and his wife started a school in Hyderabad while he was in India for underprivileged children called the Rainbow Primary School . So he has education chops as well. “I pretty much can’t believe we landed him,” says Nivi. Nivi also recently hired a chief marketing officer, Chris Strausser, who created the Jamba Juice brand, and previously worked at PepsiCo and Kaplan. Knewton, another online education startup, also recently made a top executive hire . The whole education space is definitely heating up. CrunchBase Information Grockit Roy Gilbert Information provided by CrunchBase

YCombinator -funded Adioso today launches its third iteration as an online destination for adventurous travelers who want to take vacations but are not constrained by specific days or even places. Yes, the online travel space is saturated, but the more mainstay search services like Kayak and Sky Scanner only let you find specific dates and destinations, failing if your desire is more vague. In contrast, Adioso allows you to search flights with complete flexibility, like if you want to go somewhere in Europe in November but are not committed to specific area or time. Examples of the natural language-enabled broad or open-ended searches specific to Adioso: Chicago to Boston next week San Francisco to Europe late September under $800 San Francisco to anywhere Says founder Tom Howard: “There are really no other services that let you know where you should go, and what days are the cheap days. You go to a website and you’d spend two hours trying to find the cheap deals, there was nothing that said these are the good days at this location.” Before Adioso, the only solution to the “What are the good days at this location?” kind of query was to manually do separate searches on different sites until you stumbled across what you were looking for (aka “The Traveling Salesman” problem). Adioso’s model necessitates some programming chops however, as open-ended search is harder to enable than constrained. Future plans include expanding the service’s airline and destination inventory as soon as the Adioso platform has stabilized, currently Adioso only covers a selection of airlines in Australia (the home country of founders Howard and Fenn Bailey), Asia, Europe and the USA. Howard and Baily hope that service will create an opportunities both for casual travelers (the most rapidly growing segment of the travel industry) as well for airlines who are looking for ways to best monetize left over seats on undersold flights. CrunchBase Information Adioso Tom Howard Information provided by CrunchBase