Apple Just released the new iPhone Firmware 2.2.1 , which is Available from iTunes, the update relays the following improvements:

iPhone 2.2.1 Software Update

This update contains bug fixes and improvements, including the following:
- Improved general stability of Safari
- Fixed issue where some images saved from Mail do not display correctly in the Camera Roll

Products compatible with this software update
A 2.2.1 update for the iPod Touch is also available.

 However, The iPhone Dev team released the following video clip to explain why NOT to upgrade now , but wait for the coming versions of Pwnage Tool and QuickPwn.

Source : iPhone Dev-Team