It's now set up for virtual domains, so each and every domain can have a personalized logo at the top. There's only one hitch... it's gotta be a png file.
For example... when you used to hit your webmail, you got this image in the header:

Now.... on eddie's site, it's been changed to this:

And Moxie...

Basically... you'll find a folder called "sm_logo" in the root of your webspace. Replace the png file with another of the same name and viola... all pretty and stuffs.