The iPhone Dev Team has just released a cross-platform jailbreaking, unlocking, and customizing tool for iPhones and iPod touches. We highly recommend redsn0w 0.9 if you need to jailbreak and/or unlock your iPhone. It’s the best and bug-free solution available so far.
This release supports:
– All iPhones and iPod touches (still a tethered-only JB for late-model devices though)
– Apple firmware 3.0 and 3.1.2
– Windows and Mac OSX