Okay, I think I've done everything I'm go to do right now lol, so please let me know if you see any broken images or things not working right.
The main changes are:
Private Message Sorting
You can now sort your pm's by sender or title. You can also filter your pm's by sender or title (which is kind of like a mini-search).
PM History
From vbulletin.com: "When you receive a message from another user that is in reply to something you sent them, you can now view a history of replies."
Quick edit for visitor messages
You can now edit vm's the same way you can posts.
Private Message Quick Reply
Profile Privacy
You can now limit who can see your profile info.