Hours ago the iPhone Dev Team Released the untethered Jailbreak for iOS 4.3.3 just after Apple's official release days before! This marks an amazing 3 jailbreaks from i0n1c's exploit,resulting in the release of a new version of PwnageTool and redsn0w.
1.ultrasn0w unlockers must stay away from redsn0w! Use only a custom IPSW to update to 4.3.3, to avoid updating your baseband.
2.ultrasn0w has been updated to v1.2.3 to be compatible with iOS 4.3.3 and earlier (the ultrasn0w update does not include any new baseband support!)
Reds0w 0.9.6rc15 for Windows & Mac: