CELL PHONE INTERNET ACCESS

I have a blackberry with verizon data plan that I tether to my laptop. The unlimited data plan is $59.99 and the voice plan is just the extra $10.00 for it being a 2nd phone. All together my verizon bill is $135.00 a month. Now being that I am a fulltimer, I know it is alot, but it is the cost of a phone and internet for me. My question...I have asked verizon about giving a break on a data card (I have 2 computers) and that way both of us could be online at the same time. They have told me no, so if I got the pc card and the plan again it would add another $59.99 to my bill, which I am not willing to do. Long way to get around to this question and I apologize for that, but the question is does anyone know if any of the other carriers would include or give a break on 2 data plans?

Thanks...