If you don't want the avatars (or members sigs, for that matter, which often have pics in them) to show to save on bandwidth, you can change that option in your user control panel.
Morus, could you possible make the limits (64 x 64) on the avatars a bit larger. Some of the ones already in there are bigger than that. 80 x 80 maybe?
I'm stumped. Can anyone explain how I can use an avatar? The only place I see where to actually do it is on the registration form; do I have to re-register? Can someone explain to me how to do this?