If you're like me, you regularly forget your data cable at home, in hotels or at the 24-hour Pokemon Trading Card Repository. In such cases, 2011's New App of the Year, AirDroid, is a lifesaver. It's an incredibly comprehensive remote management app that lets you access your Android device via a desktop web browser, complete with file management, app installations, photo browser, and lots more. The creators are ready to step up their game with the second version of AirDroid, and have set up an invite-only beta.
The only feature confirmed by the AirDroid team is the ability to create an account and log into remote management from anywhere, which presumably includes mobile networks.