I'm really disappointed too.
I have been waiting like many others and still no album artwork.
I have been using my Mini for a couple of years now hooked up to my entertainment center using Front Row and shared music. The music notes look horrible on my TV screen instead of the album artwork.
I guess Apple just doesn't want us to have it or they want us to buy an Apple TV. I can't think of any other reasons because it works fine in Tiger so we know they have the technology.
They could update the old Front Row for us so it we work rather than developing this new Front Row which doesn't work for album artwork. Can't figure out why this rather simple piece of software is being not getting the update it deserves. Maybe we will never know.
Joseph Kriz