While this could indicate that AT&T lost their exclusivity on the iPhone (despite the fact that the ETF has been increased on all smartphones, not just the iPhone), this does not imply that Verizon will be imminently receiving the iPhone.
There are two main reasons that I can see: A.) there has been no hiring surge of CDMA engineers by Apple, and B.) the recent chattiness about iPhones from Verizon execs (and assorted Verizon rumors, most of them utterly absurd) is unusual. Typically, Apple partners tend to clam up real tight when there's a deal in the works. This has definitely not been the case with Verizon.
If AT&T were to lose iPhone exclusivity, the most logical step would be for Apple to release the handset to T-Mobile USA, another GSM carrier. The only physical change would be to include a 3G chip that supports the AWS band (1700MHz). The iPhone itself already works fine on T-Mobile's GSM network (for voice) and EDGE.
It's worth nothing that T-Mobile USA has basically fallen completely silent concerning the iPhone in recent months. Perhaps it's just coincidence, but without a doubt by shutting their mouths T-Mobile USA is behaving far more like an imminent Apple partner than Verizon is.