I flashed it.
USB Tether: Plug OTG cable into Xoom. Plug phone with microUSB cable into OTG cable. On phone, enable USB Tether. On Xoom, run the following in terminal or script manager (Scripter, GScript, Tasker) of your choice.
setprop net.dns1 22.214.171.124
The Xoom will not show any indication that there is a network connection. But pull up your browser and surf away.