Originally Posted by
Scrodzilla
It's typical...but a few mm seems pretty drastic. Can you move it back and forth with your hand or does it only happen when the wheel is turning?
No, whole assembly is moving together. There's little play between the body and the cog.
Closer inspection (or not posting from memory after midnight) shows the wobble to be only a mm, if that. It looked so obvious and surprising, I exaggerated unintentionally.
Here's a video:
http://img85.imageshack.us/img85/2497/wobble.mp4
Note that the inner freewheel (a Dicta) is steady, so it's the ACS freewheel, not the axle.