Just a few hours ago, Geohot released limera1n to jailbreak for iPhone 3GS/4, iPod Touch 3G/4G, running iOS 4.0 and 4.1, below are instructions on how to jailbreak your iPad on iOS 3.2.2 using this recently released limera1n jailbreak.
Step 1: Download Limera1n jailbreak (limera1n.com)
Step 2: Connect your iPad to your computer via USB.
Step 3: Double click limera1n.exe file from the desktop, then click "make it ra1n".
Step 4: Follow the steps as shown in the below screen-shots.
Your iPad will be placed in recovery mode.
Now press "home" + "Power" buttons.
Release the "Power" button
Your iPad will now be in DFU mode
Step 5: Now you will see limera1n logo on your iPad
Step 6: iPad has been jailbroken successfully.
Step 7: Start limera1n from your iPad to install Cydia.
Step 8: Restart your iPad, enjoy jailbreak with Lime flavor.
Download iOS 3.2.2 for iPad.