Uncommon (http://www.getuncommon.com) is offering personalized cases for the iPhone 4S.
Uncommon Capsule and Deflector cases are compatible for both the iPhone 4 and the just-unveiled iPhone 4S. To create a personalized case, vist the Uncommon web site and and upload a JPEG image or choose artwork from the Uncommon gallery, which offers hundreds of images from gifted designers.