FYI, if any of you are using photos from Photobucket for your avatar pictures, they have disabled the linking feature unless you are a paying customer for some of the storage/use levels. So some of you may not be seeing your avatars displayed correctly. You'll need to either change your link to a picture from a different site, or upload one to your profile.
I think you need to go to your profile and choose "edit profile" - it's a button on the right side of the screen. There should be an option to upload a pic from your computer or to choose a different link to a pic on the web.