"How to Jailbreak iPad 2, iPhone, & iPod touch with iOS 4.3.3 and JailbreakMe
Visit JailbreakMe.com from your compatible iPhone, iPad, or iPod touch
Tap on the “Free” button and then tap on “Install”
Safari will quit and you will see the brown Cydia icon loading on your home screen
When Cydia is done downloading, your jailbreak is complete
That’s all there is to it. It’s probably a good idea to reboot the iOS device once it’s finished so everything works as intended. If you ever get sick of it, you can unjailbreak just by restoring the iOS device from iTunes.
Optionally, after the jailbreak is finished you may want to search for and download “PDF Patcher 2” from the Cydia store so you can patch the exploitable PDF hole that allows the jailbreak to install in the first place."
iSO 5 will be out soon and the pdf exploit will prob be closed, this was was going to be held back until 5 but some noob leaked it. Another exploit blown.