No, that was enough.
It's the "MyBlogLog" box on the right hand side of the page. Those avatar pictures come from s3.amazonaws.com.
How I figured this out:
On the page you're curious about, right click and select "View Page Info". This gives a box where you can see the sorts of things the given page links to and/or loads and such. In the "Media" tab, I saw a lot of references to images on amazonaws, and they all had "Avatar" in them.