All the details are over at http://www.apple.com/au/iphone/iphone-3g-s/
Overview of new features / specs (Additional to 3.0 software)
– Up to 2x the speed
– 3 megapixel camera (auto focus, or tap to focus).
– Video support (VGA quality), portrait or landscape.
– On-device editing, share via Mobile Me, Publish to YouTube, or sync back to mac / pc.
- Voice control (hold the home button to activate)
– Compass, re-orients maps to the location your facing.
– 16GB or 32GB models
– Black or white