Video full autofocus recording + Video stabilizer.
touch Autofocus from LCD.
MSN-voice and video chatting support
Better Bluetooth Support for Handfree
Better battery management,
On screen Zoom (Pictures, full interface zoom)
Swype Capital stay as it is.
5MP Widescreen Photo Capture instead of just 3. I'm pretty sure you can make it 5MP widescreen. The Iphone 3GS can exploit their crappy 3MP camera to 5MP resolution but still crap lol

Would be an extra bonus with: MULTITOUCH... It's great for gaming using on screen buttons and Compass ...But these will never going to happen with N900