My Accelerometer stopped working about a week ago. I just got it fixed this morning. I did a factory reset. Turn phone off, Hold down the Home Button and turn the phone back on. When you get the triangle with !, then open the keyboard and hit Alt-L, then Alt-W to wipe and reset. When the message saying phone is reset, hit the Home+Back buttons. YOU WILL NEED TO REINSTALL ALL APPS AND RESYNC ALL DATA AFTER DOING THIS!!! But it fixed my accelerometer issue.