Well, haven't I been a busy bunny??
The Dan’s Avatar Thingy Plug-in has now been updated to prevent not logged-in users from using someone elses screen name in order to display their avatar... Now, if the avatar is there you know it's the right person posting...
It also now creates the avatars folder for you, which seemed to have a lot of people stumped...
Everything else is the same...
Instructions and downloads can be found here...