This new game that was just exsclusively released ov Verizon VCast phones on October 24 called 3D Tilt-A-World. It uses the camera to detect tilting. It sounds like an intresting concept, I'm going to download it in a week or two. For more info look here:
EDIT: 1,800th post!
IGN's review (8.0):http://wireless.ign.com/articles/741/741844p1.html