No rev B in NV (unless its unannounced). I haven't seen anywhere that says rev B is part of NV, and I believe that is the general consensus here.
Not sure about the speeds, though. If, you're consistently doing better then 1 meg down, you're doing pretty good for 3G. Maybe you'll be more in the 2 range. (?). However, I believe EVDO-Advanced is part of NV, 1x-A
Edit: http://www.qualcomm....rformance-ev-do