I haven't looked at iTunes
3 yet (didn't even know it was out), but I have some serious problems with previous versions of iTunes. The first one is that it wants to remember
every track and playlist that goes through it. So if I wanna play something off of a web site, it remembers it, even if it's dynamically generated and I can never play it again. This pisses me off to no end. Many of my other problems are related to that, like the fact that I have to import stuff into iTunes to play it. I just want to play a track. Since I have multiple computers, I organize my tracks on the shared filesystems. But iTunes doesn't care. It would, in fact, prefer it if they were just all lumped together in one directory. But it's the only Mac OS X player I can find that will support URL playlists.
Maybe 3 will be better....
Edit: iTunes 3 isn't out yet! Are you trying to confuse me?
Edit again: Okay, so it is. But I swear it wasn't there before.