JailBreakMe is compatible with iPad 2, iPhone 4, iPod touch or iPad on iOS 4.3.3. All you have to do is to open the jailbreakme.com (url) in mobile safari, tap on the free button and the cydia download will start automatically on your springboard. It is also advised to save your SHSH Blobs for iOS 4.3.3 before Apple releases iOS 4.3.4. You can save the SHSH Blobs using a tool known as TinyUmbrella. The tweak can be downloaded from cydia for free.
Install the tweak now!