Actually you will be using the fastboot cmd not ADB (adb reboot bootloader to get into fastboot), totally different thing. Just follow the commands motorola has and your all set (no rebooting, just one after the other). When you get to the oem lock part, use the volume controls on the xoom to choose yes to continue....
jmc2543 post is exactly what I did
Last edited by lwick74; 11th March 2011 at 05:16 AM.
Reason: jmc2543 explained it better then I did!