I just added support for Gravatars in the comments of this site. What that means is that you can go to gravatar.com, sign up for a free account, upload your picture, and then the picture will appear next to your comments on this site and any others that support it. It's keyed off your email, so make sure that you enter the same email address when you comment here that you used to set up your Gravatar account.

I took the idea from Henry and Brendon explained it to me. If you use b2evolution and want to add this feature to your site, email me and I'll tell you how I did it. It's very simple. Too simple to even bother with a plugin. You just edit your skin and add a few lines of code.