I don't think this is right. First of all, the Verizon tab 10.1 isnt out yet, so I'm not sure how you're connecting to 3G?
Also, I have a Xoom on Verizon with a data plan. I can indeed use it as a mobile hotspot, but any hotspot usage counts toward my data plan- while Verizon does still have unlimited data for phones, they do NOT for tablets- you can pick a plan/price, but it's not unlimited.