Ummm... yes LTE is going live but that still doesn't lend credence to iPhone on Verizon end of year beginning of next. Plain and simple that would be two different product lines one for VZW and one for AT&T seeing that AT&T is not even close to ramping up their LTE network. AT&T is scheduled to start turning on their LTE services in late 2011 / early 2012 which, coincidentally coincides with the end of their exclusivity agreement with Apple and the iPhone. It is when BOTH VZW and AT&T have their LTE networks up and running in 2012 is when the LTE iPhone will come to pass and be usable on both carriers. Apple will NOT fragment or produce a separate device. Period.
Well so far the experts are saying that what your saying is wrong. While they may not be LTE ready they will be CDMA ready, from everything that has been leaked. And even having a CDMA and GSM version will already fragment apples devices, but to a minimal amount, seeing as everything else would be the same.