Verizon is much more aware of this then they used to be and have upgrade opportunities at 12 and 20 months into a contract. They want to keep their customers.
I still have a year left on my contract for Verizon, but I can't help but wonder when they are going to come out with phones that can challenge the Iphone and provide us with the sort of features that it has. Sure we get the Glyde, but using it is just a chore. Right now I'm using my LG VX8600 and love it, but I'm ready to be able to surf the web, have a decent touch screen, and just do more things in general without getting a cheaply made plastic phone that does these features half-glass.