Rumors have been trickling down for the past few months about the next-gen Sidekick, but it looks like we finally have some concrete evidence that the Sidekick 3 is for real. Phone Scoop has the latest word, as it stumbled upon the FCC's approval of the next Sidekick. While some documents remain confidential, a few details and images are available for viewing. For example, in a filing for the FCC label location, you can see that the popular messaging device has a removable battery, a 1.3-megapixel camera, and a memory-card slot. In addition, it looks like the hardware has been reworked to include more rounded edges and a new navigation joystick. Finally, it appears the quad-band GSM Sidekick 3 will again be available through T-Mobile, and it includes Bluetooth.