Found this on GottaBeMobile:
I checked with a rep, and new activations are not eligible for the 1GB/$20. Shame, too, as I'd have been all over it. I may call and try anyway.
1 day ago
Jhgih
verizon 1gb for $20 is for customers who already had this plan with ipad 2 3g
1 day ago
This makes a huge difference!! True or not I don't know !
http://www.gottabemobile.com/2012/03/07/ipad-att-4g-lte-vs-verizon-4g-lte/
From my read of the table is there any reason to buy AT&T 5GB @$50 w/$10GB overage when one can buy 3GB for $30 w/$10GB overage. Since 2GB overage from the 3GB plan gives you 5GB for $30 + 2*$10 = $50. This makes the AT&T option a simple one, get the 3GB plan.
Verizon you must chose wisely my son, since $30 for the 2gb can get you into trouble with its $15gb overage i.e. 5GB at the 2GB plan nets you with $30 + 3*$15 = $75.
I hate to have to decide up front what my data needs for the NEXT month will be.