A few week back Jailbreakme 3.0 was released for iOS 4.3.3, those who were lucky enough to Jailbreak their iPAD2′s and iphone4′s will thank themselves for doing so.
Apple has patched the jailbreak exploit with iOS 4.3.4 release. So stay away from this update, until iphone-dev team comes up with a solution.
Unavailability of Unlock tool for Jailbroken iPhones holds true except for the use of Turbo Sim