pageoneresults - 4:48 pm on May 25, 2010 (gmt 0)
If you do decide to allow Avatars, there is of course an SEO benefit to this. If everything is done properly, semantically, etc., those Avatars can pull rank in Image Search. I know, I've performed experiments with this and have a few Avatars in a number one spot based on name searches. Just ask @rishil on Twitter. :)
I'd like the option to name the file path of my avatar image using either my username or my real name, one or the other.