I notice that some people asked about users specifying their own avatar URLs: In the original Avatar 2 MOD there was an add-on (pop_add_avatar.asp) which allowed you to do this which I adapted to add Avatars to my own v3.4.xx forums along with my own adaption of the rest of the original 3.3.02 MOD.
Also, the size thing: Richards original MOD had a second database table (AVATAR2) that had the avatar setting for height, width and border which you could change as necessary via the Avatar Admin pages.
If anyone wants any of the code for these extra bits (which are probably going to be in Aaron S's Avatar PLUS MOD anyway) just email me and I'll try and send you the stuff between doing my AS work for school