iPhone OS 3.0 firmware officially released and now available

Apple have officially released iPhone OS 3.0 firmware and it is available to download via iTunes.
This update contains over 100 new features, including the following:
• Cut, Copy & Paste with shake to undo
• Landscape keyboard in key applications
• Enhanced Messages application
- Send and receive photos, contacts, audio files, and location via MMS*
- Forward and delete single or multiple messages
• Added search feature in Mail, Calendar, Notes and iPod
• Spotlight search across iPhone
• Support for CalDAV and subscriptions in Calendar
• Improvements to Safari
- Performance
- HTML 5 support
- HTTP Streaming audio and video
- Auto-fill usernames and passwords
• New Voice Memos application
• Sync Notes with a Mac or PC via iTunes
• Internet Tethering over USB and Bluetooth*
• Browse and download movies, TV shows, and audiobooks from the iTunes Store**
• Stereo Bluetooth***
• Wi-Fi auto login
• Enhanced Stocks application
• More Parental Control