Can anyone shed any light on this link I've found below.....suggests Yellowsn0w are on the verge or have done an unlock of 2.2.1........so maybe its just around the corner!!
http://www.blogsdna.com/2370/download-yellowsn0w-098-to-unlock-iphone-3g-221.htm
"When Apple has released Firmware 2.2.1 for iPhone and iPod touch, iPhone dev team had warned to all iPhone users not to update their iPhone as you may lose the ability to unlock your iPhone. But Now you don’t have to worry as dev team is about to release latest version of Yellowsn0w 0.9.8 which is capable of unlocking iPhone 3G with firmware 2.2.1"
http://www.blogsdna.com/2370/download-yellowsn0w-098-to-unlock-iphone-3g-221.htm
"When Apple has released Firmware 2.2.1 for iPhone and iPod touch, iPhone dev team had warned to all iPhone users not to update their iPhone as you may lose the ability to unlock your iPhone. But Now you don’t have to worry as dev team is about to release latest version of Yellowsn0w 0.9.8 which is capable of unlocking iPhone 3G with firmware 2.2.1"