Well unfortunately this site only allows you to add 30 extra avatars other than the defaults to the avatar gallery. So here I'm going to post a few links to sites where you all can get your own digimon avatar.

http://giffactory.joeyteel.com/gif/misc.html
A lot of Gif images of characters and digimon here, huge collection. Also has some animated stuff.

http://avatars.animeserve.com/v/Digimon/?g2_page=1
Pics of characters and digimon taken from the show along with some animated digimon stuff.

http://www.angelfire.com/anime3/culuculu88/gif.html
A collection of small animated clips from the show of characters and digimon.