My way around the multiple artist entries at the moment is to use "move/copy fields" in mc to send the artist info from the "artist field" to the "composer" field. Then I put the album name in the "artist field". That way, when navigating on the ipod, I can start at genre, go to movie sountracks for example, and then see them grouped properly.
If you want to be able to see the real artist info on the ipod I guess you need to make a "[artist] - [name]" field in mc, and then move/copy that info to the "name" field so its visible on the ipod.
This is a very long way around the problem though. My faith is in Steve to get the multiple artists feature back in somehow.
By the way steve, how does itunes get around this problem?
And (slightly ot) why is it that itunes cant see mc last played and playcounts info?