The cable cos obviously see the benefits to using a wireless device to expand the functionality of their home services (think: place-shifting DVR content to your phone, unlimited calls between home phones and cellphones, etc.), and don't even get us started on what happens when you start talking WiMax, which is another thing briefly touched upon in the release.

ENGADGET: Sprint Nextel now also together with Comcast, Time Warner Cable, Cox, and Advance/Newhouse

Start-up Instagram, which has grown quickly to more than 7 million registered users after launching in October, started as a mobile-only photo app and has inspired a number of other competitors.

FORBES: Why Start-ups Are Building Mobile Apps First