Greenpois0n for Windows is out now to jailbreak 3.2.2 on iPad Wifi & 3G. So, if you had troubles to jailbreak iPad 3.2.2 with limera1n, you can use greenpois0n to jailbreak iPad. Here is simple step by step greenpois0n iPad tutorial on how to jailbreak iPad iOS 3.2.2:
Before you Begin: Update iPad to iOS 3.2.2.
Step 1: Download Greenpois0n
Step 2: Run the greenpois0n app
Step 3: Turn your iPad off and connect it via USB
Step 4: Press “Prepare to Jailbreak (DFU)” button in greenpois0n, you will be guided by Greenpois0n on how to perform next steps.

That steps are illustrated below:
Step 5: Press and hold sleep button for 2 Seconds.
Step 6: Now Continue holding sleep button and also press and hold home button for 10 seconds.

Step 7: After 10 seconds, release sleep button but continue holding the home button for another 15 seconds.
Step 8: Greenpois0n will show “Ready to Jailbreak” message, click on “Jailbreak!” button at bottom left to start the jailbreak process.
Step 9: Now let greenpois0n complete its process, once done it will show “Jailbreak Complete!" message.
Step 10: That’s all you got to do. You should now have Cydia installed on your device.