Can I convert my Xoom 3G firmware to Xoom WiFi or otherwise use the WiFi version of Jelly Bean? So I have a Xoom 3G and I only use Wi-Fi. Jelly Bean is coming out for the WiFi-only version and of course Verizon is going to make sure that the 3G/4G version doesn't get Jelly Bean till Key Lime Pie is out. So my questions are: Would the WiFi version work on my Xoom? If so, can I somehow spoof it to think it's a WiFi version to get the update and/or can I manually update to the WiFi Jelly Bean?
Yes, you should be able to install a wifi only rom manually, I`ve just gone to ICS with 3g and its great. 

found these links useful:

http://www.youtube.com/watch?v=BfHwd2Nxw1U

http://www.icsforums.com/forum/showthread/6398

http://forum.xda-developers.com/wiki/Motorola_Xoom

hope this helps