Harmonix has released something known as Dance Central Dance Cam for iPhone, Android and Windows Phone 7 devices. The app will allow users to pick previews of tracks on it, then practice them and be recorded whilst doing it. Videos can also be showcased for Facebook friends. Songs from the game are included, featuring I Like It, Bulletproof and Like a G6.
Get it from all respective marketplaces in the US now, with it coming to Europe soon. And no, I'm not touching it within a 50 mile radius.