You cannot revert to 4.3.3 unless you have original SHSH blobs, which I doubt you have. Just sit and wait for iOS 5 coming soon. They have been abl to crack every beta release of it within a matter of hours. BTW, the jailbreakme.com creator works for apple now as an intern, which means it's only gonna get harder for hackers to find a security hole since they have one of their own working for the big guy.
Sent from my iPad 2 using iPF