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!"
Verizon got a lot spotlight when it became the first to carry the first Windows Mobile Treo. Sprint is already scheduling the new 755p to be out on 5/14. I haven't heard any definite dates for 755p's release on Verizon. Verizon might be just a few months behind Sprint when it comes to Palm powered Treo, just like they did with the 700p.