It appears that the new iPhone 2.1 firmware is available as of 9am Eastern time.
According to Apple, the following things are in this release:
- decrease in call set-up failures andcall drops
- significantly improve battery life for most users
- dramatically reduced time to backup to iTunes
- improve email reliability, notable fetching email from POP and Exchange accounts
- faster installation of 3rd party applications
- fixed bugs causing hangs and crashes if you have lots of 3rd party applications
- improved performance of text messaging
- faster loading and searching of contacts
- improved accuracy of the 3G signal strength display
- repeat alert up to two additional times for incoming text messages
- option to wipe data after ten failed passcode attempts
- Genius playlist creation
You can learn more about the update by going here on the Apple web site.

