I really like this idea. I've been considering an iPad and I'd love to tether it to my iPhone's data plan. I'm on Verizon. Unless I pay the tethering tax I can'

I really like this idea. I've been considering an iPad and I'd love to tether it to my iPhone's data plan. I'm on Verizon. Unless I pay the tethering tax I can't do it without jail breaking. If I can take my data plan and apply it to any device that I own that'd be great. I'm one person, why should I need two data plans?