Zero integration with iTunes - I want to share or favourite tracks as I am listening to them.
The pre-selected favourite tracks don't represent my tastes.
Hard to see what the favourites are as they use album art rather than track titles.
When I choose to add favourites manually I can't browse my library and have to abort the profile update to look at my lists!
The recommended artists bear even less relationship to my tastes.
No way to import contacts.
Talk about connecting to Facebook but no way to do it.
No way to create or share lists
No integration with Twitter
Photo upload still not working!
[I originally called this post Ten things I don't like about iTunes 10 but realised it was Ping I was ranting about. That then made me question the version number change for iTunes as bugger all else has changed except Ping!]