I just threw in support for Gravatar in my blog comments. If you go and sign up for a gravatar account, you can assign a picture to your email address, then when you post a comment on my blog or other blogs that support gravatar, your picture will show up next to it.

It's pretty easy to implement gravatar on your blog, you just use an img tag that points to gravatar.com with an MD5 hash of the commentors email address in the query string.

So go and create an account, and you can test in my comments here if you want (I am only showing PG, and G rated pictures).