I have received a lot of request for information to Jailbreak their iPad with iOS 3.2.2 installed. If you have recently purchased your iPad, you are out of luck until November when the iOS 4.2 is released...which will hopefully be followed by an awesome iPad Jailbreak for the new iOS 4.2!
If you purchased your iPad within the past couple months, it likely arrived with 3.2.2 which has the jailbreak method blocked to your iPad. If you upgraded to 3.2.2 and backed up your SHSH Blobs on your iPad, you can revert to that and then jailbreak your iPad.
Hopefully iOS 4.2 will be jailbroken promptly...or will be so awesome that it won't require one (unlikely)!