Sprint, which originally was supposed to use a standard called EV-DV for their next-generation high-speed wireless network, have made an about face and now say they're going to use EV-DO instead.
The big question was whether Sprint would decide to use the same technology as Verizon, or would wait a little longer (thus delaying their rollout) to use EV-DV, which is similar to EV-DO but has better download and upload speeds (thus making it better for video calling).