
My multi author blog profile gadget looks like this:

It works on single author blogs, too, and one could customize it to look about the same as the default single author blog profile gadget, but I'll leave that for you as an exercise. :)
Installation is simple. Add HTML/Javascript gadget into your blog, and paste the following code there:
You can configure some things in the script: maximum user name length, author line template, avatar size, and is avatar cropped or streched. As always, you can also modify the CSS to your liking.
This was "thrown together" very quickly, but it works ok so I decided to publish it. Hope you like it.