I have no idea how much (if any) trouble it would be to add this, but I second the request for showing album art that's saved in the tag. That's the way I have my whole collection set up (thank you, MediaMonkey) and it seems the best way for me to keep track of the art.
Thanks again for a great new direction in this fine software.
**EDIT** I just read in the other thread about plans for adding Winamp viz support through plugins - I know WA is capable of showing art from the tag. Would that be an easy way to solve this request since you're already headed that way?