Just found a cool bit of information about those little arrows in the new iTunes. It appears you can change the behavior so that it doesn't go to the iTMS. Yay! That's one gripe down.

My other is that the party mix should use songs from shared playlists. I mean, I have access to all this music remotely (on my server) directly into iTunes, and I can't use it with the one new feature I think is the neatest. So that's a big nitpick/wishlist item. I still think they should have the concept of an 'admin' iTunes user. So that I can store all my music on my desktop, but edit playlists and song information and ratings from my laptop. That would truely rock.