100x100 pixel icons or avatars are generally made for livejournal, but they've spread to message boards and the like as well. There's a large community that's developed around creating and sharing icons for other users. As someone who's generally eager to try new things, at least creatively, I thought I would try it out. Predictably, I can't seem to stop. I find the small size both exasperating and educational. There's a lot involved in cropping and color choice in general, and arranging images in such a small space only accentuates that.
If you're in any way interested in my icons, they're all free to distribute and use. The sampling below is just a few of my favorites.