Or, knowing your fantastic (not to flatter, just because it is) photography, you could download a photo of your own to a site like imageshack, photobucket, or many others, put it on your desktop, and then unload it to gravatar.com
You can put several photos on that, and choose one to be selected.
Given you sign up to gravatar with your email address used on a2k, the selected photo will be put in avatar sizing (you can crop) be transferred onto a2k as avatar within a day or two, probably sooner. Sometimes it takes a while, and that is usually because you should clear your cache...
(I just did this - see the new Pacco pic?)