Get requests all the time for avatar images, both custom and collections of existing stuff. I have plenty more of this coming, but thought I would start with these. You can get them individually below, or you can download them together in this zip file. These include Jake, Jeff the Dog, Mike the Cat, Gilmore, and Vincent and Steve the Duck from Experience Points. Good for use with Twitter, Facebook, FriendFeed, message boards, or whatever you like.