Apple has just dumped another firmware on the iPhone. This one is a small update to 2.2 and only includes a few stability fixes to Mobile Safari and one for mail images not saved to your camera roll.
As always if you have an Unlocked or Jailbroken phone approach this update with caution, you will need to reapply any hacks you have setup.
No copy and paste here, move along everyone! What you can expect in the new, just-released 2.2.1 software update for the iPhone is "improved general stability of Safari" -- always encouraging -- and a fix for saved Mail images not showing up just right in the camera roll. It's like Christmas in January!