Nope, not gonna happen. AT&T has the exclusive contract for another year.
Bloomberg are a bunch of idiots, this is the third time they've started such a rumor. They're also forecasting the doom and gloom of RIM's demise. I dunno where they get their info, I see a hell of a lot more people with Blackberries than iPhones.
What happens next year may well be interesting. Frankly I can't see Verizon as being all that eager to bend over for Apple just to carry the iPhone, especially with how many issues the iPhone4 has already experienced. They already have a lead on AT&T in the customer base, have good phones, great coverage and much better customer service.
I would hope it doesn't happen, I have Verizon and am very happy with the coverage, service, and my Droid Incredible. I'm considering trying to wheedle and deal an upgrade to the Droid X when it comes out next month. I don't even want to think of Verizon's network being turned into chaos like AT&T's has been ever since the iPhone came out.
If someone else does pick up the iPhone next year, think of how pissed off all the fools who ran right out and sold their souls to AT&T for the next two years are going to be. Locked into another year after that with a terrible network and as of this writing, a rather unreliable phone. Ugh!!!