Let the hive mind of Engadget get that for you.
"I just switched to Sprint from Verizon about three months ago for the Pre. Then I went for the Hero about a week ago. Now, I miss my hardware keyboard and am thinking about switching to the Moment. I am still able to switch back to Verizon if I want and get the Droid when it arrives. Should I just trade up to the Moment when it comes out, see if I like it, and if not switch to the Droid? Or something else entirely? Help!"
here's the deal: the 39.99 plan that was unlimited is going to 29.99 with a cap of 20mb. the 49.99 plan that had 1000msgs and unlimited data is going down to 39.99 with 1500msgs, it is a significantly better deal than previously