Are you growing tired of waiting for an iOS 5 jailbreak? Do you wish you could go back to the good old days of iOS 4.3.3, when jailbreaking was simple? If you answered yes to either one of those questions, you might be interested in TinyCFW.
TinyCFW is a new downgrading tool by TinyUmbrella-creator NotCom. Using your saved SHSH blobs, you can use TinyCFW to downgrade your iPhone 4 or iPad 2 to iOS 4.3.3 so you can go back to having an untethered jailbreak.