I've said it before and I'll say it again. Unsealed court documents have the AT&T iPhone exclusivity. It also makes sense for Apple not to move to Verizon yet. The reason is two-fold. First, they'd have to break their existing contract with AT&T and that likely has some penalties involved. Second, they'd have to design the internals of the iPhone for CDMA. This phone design would only last two years tops. With both Verizon and AT&T moving to LTE for their 4G networks, it's easier to just wait another year and design a dual carrier phone with one hardware revision.
I find the following quote laughable in some ways.
For Apple, a partnership with Basking Ridge, New Jersey- based Verizon Wireless is a victory over rivals such as
Research In Motion Ltd. and Motorola Inc., whose smartphones are currently promoted by the carrier.
While Apple would definitely benefit from a partnership with Verizon, at this point, Verizon is probably wooing Apple more than the other way around. After all, even with the surge of Android devices, Apple's iPhone is still an attractive product (customer loyalty!) for any carrier.
Also, Apple has already "won" against RIM and Motorola. Hell, beating Moto isn't too difficult since they've been on a huge decline even before the iPhone's release. Apple has been beating RIM in the consumer smartphone front as RIM devices currently doesn't have the polish of either the iOS or Android. The only area where RIM still really dominates is the corporate front but both Android and iOS are making progress on that front.