You cannot say that there are any surprising updates. According to GearLive, the new features are:
1. The ability to send an SMS message to multiple people - no need for third party app anymore!
2. Google Maps application can now pinpoint your location using cell tower triangulation - yeah sort of pseudo-GPS.
3. Google Maps can now display the Hybrid map view
4. You can now drag and drop application icons on your home screen - this is really cool.
5. The home screen supports pagination - very nice function.
6. You can now add web bookmarks to your home screen - I think this is one of the coolest enhancements.