iPhone OS 3.0: 100 New Features, 1,000 New APIs. The beta version of the iPhone OS 3.0 is now available to download. It is available only for those in possession of a developer account and a registered iPhone in the developer program. You should not download this from torrent, it will have your iPhone wiped and locked, inactivated unless you have a dev account. For iPhone OS 3.0 screen shoots and video walkthrough
Copy and paste.
Messages.
Voice Memo interface.
Spotlight and Mail search.
Key apps getting landscape mode.
Camera and Photos.
YouTube and Settings panel.
Parental controls & contact sharing.
New screenshot interface.
Encrypt iPhone backups and Note syncing
[via Apple Insider and Engadget]