This method requires an OTG Cable. DO NOT TRY THIS ON YOUR 3G XOOM!
I just did this myself, so I know it works as long as you are on 3.1 already.
1. Acquire an OTG Cable and a USB Thumb Drive, Copy the 3.2 stock image and rename it as update.zip. Plug the OTG cable into your Xoom with the thumb drive attatched.
2. Reboot your Xoom.
3. Once the dual core screen comes up, tap the volume down button repeatedly until you get menu options.
4. Select Android Recovery and press the volume up button.
5. At green android, hold the power button and tap the volume up button once, release the power button.
6. Select the Apply Update option, and choose the correct file from the USB Drive. Tap the power button to continue.
7. Let it run through the update process, choose reboot once it is complete, and enjoy!
While I can't post a link, the 3.2 stock image file can be found on Droid-Life. Be sure to use the signed update image and not one that was pulled from a device for this process.
While it worked fine for me, you are responsible for your own device. I am not.
I just did this myself, so I know it works as long as you are on 3.1 already.
1. Acquire an OTG Cable and a USB Thumb Drive, Copy the 3.2 stock image and rename it as update.zip. Plug the OTG cable into your Xoom with the thumb drive attatched.
2. Reboot your Xoom.
3. Once the dual core screen comes up, tap the volume down button repeatedly until you get menu options.
4. Select Android Recovery and press the volume up button.
5. At green android, hold the power button and tap the volume up button once, release the power button.
6. Select the Apply Update option, and choose the correct file from the USB Drive. Tap the power button to continue.
7. Let it run through the update process, choose reboot once it is complete, and enjoy!
While I can't post a link, the 3.2 stock image file can be found on Droid-Life. Be sure to use the signed update image and not one that was pulled from a device for this process.
While it worked fine for me, you are responsible for your own device. I am not.