In App Purchases- Peer to Peer connectivity
- Accessories API
- Maps API in Apps
- Turn By Turn
- Push Notifications
- New APIs allowing access of various iPhone hardware/softwarer
- Bluetooth Connectivity
- Cut, Copy and Paste
- Landscape Mode
- MMS
- Voice Memos
- Search for Apps like Mail, iPod, Calender…
- Spotlight
- New Home Screen
- Stereo Bluetooth
- Tethering Support
Available in “Summer” (June?) for iPhone (limited features) and iPhone 3G as FREE update and for iPod touch users for $9.95
Apple iPhone OS 3.0 Preview site: http://www.apple.com/iphone/preview-iphone-os/