I get the same thing and it seems to be getting worse as time goes by. Right when it returns to center, you can hear and feel a bit of a "snap" coming from inside the steering wheel. Especially when it is cold...I also have had an intermittent squeak that appears when the wheel returns to center, but that doesn't happen to much anymore for some reason.I'm still thinking the clock spring is what is causing the issue in mine, but I have yet to get it looked at. I'll do that when the air bag light comes on, the cruise stops working, or the horn no longer functions. Here are a couple threads from previous issues that sound similar to yours:
http://forums.genvibe.com/zerothread?id ... id=760Good luck and let us know what you find.