I just noticed that the
Anime On DVD forums use 100x100 sub-20k avatars, and some of the forum mods set up a
website as a repository for board-member designed avatars. They're organized by contributor and series.
There are obviously a lot of really nice anime-themed avatars in there. I'm sure they wouldn't mind other people stealing their avatars, as long as you upload them to Photobucket or your own webspace, and don't leech away their bandwidth.