List all Blogs with Avatars (like edublogs supporters)

Hi,

I want to list all users or all blogs on my frontpage like on the edublogs.org page. I'm using the avatars plugin and checked out the edublogs theme, but the supporters box didn't appear. The avatar plugin only shows the current blog with -> get_blog_avatar(id,'128','identicon'); I guess I need a kind of loop, but I'm not that PHP expert... I hope you can help me with that.