Patently Apple dug up a patent related to building 3D avatars, which could be for GameCenter or a number of other areas where you would want to create an online personality:

Earlier today we introduced Apples 3D Avatar App which covered a basic overview of the new application in the works. Now a second patent application has surfaced and it actually shows that the app is already running on an iPad! We have the screenshot to prove it. The new patent application focuses on how the app will work with color palettes and more. The big news however is that the new 3D Avatar App is in its final stages of development and that’s very cool. Evidently phase-one of the application is geared for the younger crowd, but other editions could be in the works as discussed in our first report today.

Source [9to5mac]