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!"
If it's a winmo phone:
convalesce
convict
convolute
convulse
If it's not (maybe their android phone?):
convey
converse
convenient
converge/convergent/convergence
If it's like the tilt:
convertible
I'm putting my cash on Converge.