Q8 Loco
Posted on his blog that you can now unlock your 2.0 firmware iPhone.

However the iPhone Dev team recently clarified things on their blog, stating;

“Update 1: Just to clear up some confusion over what this actually does: yes, it jailbreaks and unlocks older iPhones, and jailbreaks iPhone 3Gs and iPod Touches. We only support the 2.0 firmwares.”