While the majority of news that came out of yesterday's HTC event in London was hardware related, there were some changes on the phone themselves. We noticed (thanks to a tip from one of our readers) on the HTC Omega that there was a Tango app. Before we get into it, don't get this confused with the proposed Windows Phone Tango update that is destined to hit us between Mango and Apollo as it's not entirely related.

So what is this Tango app then? It's basically a video calling service that's currently available on iOS and Android now arriving on Windows Phone. In the photo above, captured by Jay Bennett, we saw the app on an untied Omega held by a Microsoft employee. What we've found out is that this app will connect to other apps across all supported platforms (iOS, Android) and provide a Skype/Facetime experience.

Check out the video after the break of Tango.