iPhone 4.0 OS SDK will ship later this summer.
Some features:
- In-app SMS
- Date Formatters
- Automated Testing
- Performance Profiling Tools
- Carrier Info
- ICC Profiles
- Quick Look
- Draggable Map Annotations
- Embed PDF Metadata
- Image I/O
- Full Map Overlays
- Block-Based Animation
- Date Formatters
- iPod Remote Control Accessories
- Power Analysis Tools
- Half-Curl Page Transitions
- And More!
