1) Hotmail ActiveSync has been fixed. It now works with the native email app. Finally I have a unified Hotmail/Gmail inbox. However, its not perfect. No HTML mail support :'(
2) Facebook status in contact page under the name
3) Facebook photos and albums under a photos page after openning a contact.
4) Facebook calendar sync with Calendar app.
5) Every one of your facebook albums are now in your andriod gallery application.
6) There is a new page called interests that show all the facebook groups a contact has joined.
7) Locked home screen shows summary of SMS notification. This looks new to me.
8) Sometimes when scrolling the screen would register a tap when I meant to scroll (this happenned frequently). They seem to have tweaked the sensitivity and it appears better. Or maybe I am imagining it.
9) Generally faster scrolling. Again maybe I am imagining but it does appear smoother.
10) Photos look better. 8/6mp files don't seem any bigger than before so they probably tweaked sharpening settings or something else.