Motorola XOOM
 

1. Power off XOOM.
2. Power back on and when the “DUAL CORE” screen pops up, tap the volume down button.
3. Use the volume down button until to you see “Android Recovery” displayed.
4. Press the volume up button.
5. A green Android should appear on your screen.
6. Press Power and volume up (in that order) and you will enter recovery.
Still no luck on getting the device to accept the update file though. Working on it!
How to re-gain root access after the update:
1. From a command prompt, type the following commands.
adb remount
adb shell chmod 4755 /system/bin/su
2. Reboot. Have fun!