Trying to root Motorola Xoom. Stuck rebooting I am rooting my Motorola Xoom wifi tablet following these instructions:

http://www.droid-life.com/2011/02/25/how-to-root-the-motorola-xoom/

I unlocked the bootloader fine. And I got to this point:


Type:  adb reboot bootloader
Type:  fastboot flash boot rootboot.img
Type:  fastboot reboot
Wait for your device to reboot all the way.


Except it never rebooted all the way. It is stuck on a black screen with a red M motorola logo and the words Dual Core Technology. Its been about 20 minutes or so now. Should it be taking this long? and if not how can a make it to try rebooting again?
Ok, so it turns out that you need a different boot.img file for the Motorola Xoom wifi only model than for the 3g model. 

Click here for instructions if you have a 3g model

click here for instructions if you have the wifi only model (Including how to fix it if you've already tried using the wrong boot.img and you are being stared at by a non-responsive boot screen that has the Moto logo and the words 'Dual Core Technology')