The SDK release is focused on bug fixes rather than introducing new features.
You can download the new SDK Beta 8 through the iPhone Dev Center.
iTunes 7.7 features:
- Use MobileMe to have push email, push calendars, push contacts, and bookmarks delivered over the air to your iPhone.
- Sync all or selected applications
[Update] iPhone 2.0 Firmware 5A345 has also been released!