Or bite the bullet and use the latest iTunes alone without MultiPlugin. I've been using iTunes without MultiPlugin for nearly a year and a half without any problems.
I use the iTunes store's ability to get album art. Also, I use Amazon.com and Wikipedia. Interesting enough, I had Marilyn Manson's album art several weeks before release, since it was on Wikipedia.
There is graphical differences (they changed the way the UI looks in v7.3), and there are other little differences, including, the new alpha-numeric ordering or artists in the iTunes library (numbered artists/albums go after Z instead of before A).
Then don't use iTunes 7? There's bound to be compatibility issues. Apple changed a lot from the 6.x builds to the 7.x builds. Blame them.
We'll just have to wait till the new update for the newer builds. Having Real Lifeā¢ Syndrome kinda complicates that though.