Avatar is the name.
Go to your User Control Panel > Options > Profile > Edit Avatar
The two options are to find an image to use or to use one from our gallery. Currently, I do not have a gallery uploaded (this will take some time), but you can find one from an outside source if you'd like.
Find an avatar you'd like to use (it seems a lot of sites want you to download the image, which would require you to then host it somewhere) and paste the URL (the address,
http://www. etc...) into the "Link off-site" line. Then, put in the avatar dimensions (for this board, the maximum is 100 x 100) so that it looks right.
Once I get a gallery built, you'll just have to select one from a menu instead of all that.