We've added about 20 more images to our default avatar image list. Check it out if you want to use an avatar, but don't have a custom one in mind yet! To change your avatar, just click "Settings" at the top, then click "Edit Avatar" in the "My Settings" menu to the left. Click the page numbers at the bottom to scroll through all of them. If you have any other ideas for "stock" avatars, let us know!