The number of apps available for Google Glass continues to mount, with Google announcing a host of new partners at I/O, including Twitter, Facebook and CNN. The Twitter app gives Glass users access to their stream, allowing them to post messages and photos, TechCrunch explains. Users will have to specify which Twitter contacts they want to receive notifications from, to avoid too many distracting updates. Facebook for Glass is basically a photo sharing tool, allowing users to post pictures to their Facebook page, than add captions by voice input. The CNN app, meanwhile, can apparently send video to Glass and stream news in a browsable feed, with the user able to set up customisable alerts.

Well, that’s how many we think tried Twitter’s new music discovery app last month. We’re cross-referencing data from Onavo and comScore to reach that figure.

Here’s how: Onavo reckons that Twitter #music was actively used by 1.18% of US iPhone owners in April, extrapolating from stats from its data-saving app.

comScore’s latest figures claim there were 49.6m active iPhone users in the US in March. If that figure held steady, it indicates around 585k active Twitter #music users that month in the US alone.

Twitter and ESPN will today announce a deal bringing sports clips to the microblogging site. The Wall Street Journal reports that ESPN will air video-highlight clips on Twitter of major sporting events over the next year, including football games in the run up to the World Cup. The broadcaster will sell ads that will appear within the clips, with advertisers obliged to commit to a minimum value of Promoted Tweets.

Mashable is blunt with its assessment of the Twitter #music app’s slide down the App Store charts: “It’s starting to look like Twitter’s music app may be more like Poke than Vine.”

Poke, of course, being Facebook’s novelty Snapchat-style app that sank with barely a trace just before Christmas. The article tracks Twitter #music’s fall out of the 100 Top Free iPhone apps in the US, having peaked in the top five.

By contrast, Twitter’s video-sharing app Vine has stayed in the upper reaches of the App Store charts for some time. It seems early adopters jumped on the company’s music discovery app, but it’s yet to catch on with a wider audience.

After a week of speculation, Twitter finally launched its new music discovery app yesterday for iPhone and as a website.

Based on its acquisition of startup We Are Hunted, the Twitter #music app provides a way for Twitter users to find new songs and artists based on what’s trending on Twitter, what people they follow have been tweeting about, and their own music preferences.

Twitter is certainly bullish about its potential, claiming that it will “change the way people find music”. We’re more cautious: it’s just one more way to find music, based on a single data-source (Twitter), which will sit alongside Shuffler.fm, Hype Machine and the social features of streaming services like Spotify, Rdio and Deezer.

WhatsApp is “bigger than Twitter”, according to CEO Jan Koum, who revealed that the service now has more than 200m active users. Twitter’s last public milestone was also 200m users but Koum supported his argument by revealing at the Dive Into Mobile conference that WhatsApp users now receive 8bn inbound messages and send more than 12bn messages per day. Also celebrating some large numbers at Dive Into Mobile was Snapchat CEO and co-founder Evan Spiegel, who claimed that 150m messages a day are now sent through the service, almost four times the 40m images Instagram processes every day.

No, you can’t use Twitter’s new music discovery app yet: despite rumours of a launch this weekend, it’s still only celebrities like Ryan Seacrest who’ve been given early access who can use it.

That said, the app is expected to launch properly in the coming days, with details leaking out over the weekend about more of its features.

Based on developers poking around in the source code for the placeholder website music.twitter.com, it seems streaming music services Spotify, Rdio, and SoundCloud are integrated, along with YouTube and Vevo for videos, and iTunes for download purchases.

Artist biographies, charts, verified users (those celebs again, but also artists) and search functions will also be in the app, developed within Twitter by its recently-acquired music startup We Are Hunted.

Strategy Analytics has published the results of a survey of 6,500 people in the US and Europe on their Twitter habits, showing a clear trend towards mobile usage.

The survey found that between March 2012 and October 2012, the percentage tweeting from desktop or laptop computers fell from 77% to 64%, while the percentage using a tablet or smartphone rose from 56% to 71%.

In fact, it may be higher now in some parts of the world. Last week, Twitter UK’s Dan Biddle told the MIPCube conference that 60% of Twitter’s 200m active users are accessing it from mobile devices, and that this rises to 80% in the UK.

Digital music discovery startup We Are Hunted has confirmed that it has been acquired by Twitter, a month after rumours of the deal first broke.
“While we are shutting down wearehunted.com, …