Swype! Unlikely but i think it would be a great addition to have for sure
wifi hotspot
swype built in to email and texting
google goggles
google navigation
tv out (display iphone on external display)
HD out
Ability to change way to unlock
Radio
visualizer in ipod
widgets
better notifications
In app SMS. REAL in app SMS...not what Apple calls in app SMS. Apps just as biteSMS are the sole reason why I jailbreak my iPhone.
So I would like
REAL in app texting
Better notifications
Better customization
Better multitasking
Apple didn't say they were implementing in-app SMS. They said that it's an API for developers who, say, want an app which can send a text within an app.