That still leaves the possibility of other carriers open, though, and it does corroborate what we've heard from the Wall Street Journal, which said a while back that Apple would bring a CDMA-enabled iPhone out on Verizon's network. Honestly, at this point, it's all just a blur -- we've heard rumors for almost years now that Apple would release an iPhone on one technology or another, and to date, there are no (non-jailbroken) iPhones in the US that run on anything but AT&T's 3G network.
As with all of this stuff, nothing is legit until we see Steve actually holding it up there on stage.
*Verizon is currently in the process of acquiring AOL, Engadget's parent company. However, Engadget maintains full editorial control, and Verizon will have to pry it from our cold, dead hands.