PwnageTool, redsn0w, & ultrasn0w Updated for 4.3.3 Untethered
The original exploit, found by @i0nic, was not patched when Apple released 4.3.3. However, there were some kernel crashes and other related issues that kept these above programs from rendering an untethered jailbreak. The team has finally fixed it and now it's hit the mainstream. All iDevices are supported with the exception of the iPad 2.
HERE"]Download from HERE[/URL]
ultrasn0w can be found on Cydia. If you don't have the repository added (or accidentally deleted it), the repository is: repo666.ultrasn0w.com