Thanks to Mac Rumors for this. http://www.macrumors.com/2010/05/23/sprint-to-also-get-iphone-this-year/
More likely than Verizon, less likely than T-Mobile.
Again, CDMA would require all new hardware and I just don't see Verizon since a major selling point of the iPhone is how much you can do at the same time. i.e. data and voice simultaneously. Sprint supports that, but so does T-Mobile, and since at&t and T-Mobile share the same tech, it's a matter of popping in a new SIM and you're golden.
Verizon has bad-mouthed the iPhone and Apple too much. They'll never see it. NEVER.
I just vomited in my mouth thanks to the title of this thread.
@iquinn
China Unicom uses W-CDMA which is actually more similar to GSM than CDMA, despite the name.
I have been comparing Sprint to ATT. I have been with ATT since 1998 and I love their service. A dropped call here and there does not bother me. It has not been excessive in years. Customer Service at ATT has been overall pretty good. I love the iPhone and have had everyone since 2007. I have an iPad and Macbooks in my home.
But, with Sprint I could save $100 per month. Scary to say the least to switch but I would most likely switch if Apple and Sprint got together. I could deal with one at a time voice and data. And according to their maps which include Verizon + Sprint =coverage I think I would be okay. At least I would have 30 days, no obligation to find out.