The iPhone is well represented in the Northeast and the Midwest, according to statistics published by Jumptap, a network mobile ad. The iPhone is also strong in Montana and Louisiana.
Android is very strong in the West, Ohio, Pennsylvania and New Jersey rust belt. BlackBerry remains strong around Washington, DC, with RIM being the supplier of choice for the bureaucrats in the Government - at least for now. Corporate-centric New York is also a bastion for BlackBerry.
It seems to be no obvious correlation between the iPhone or Android and statistics as the density of population and per capita income. TechCrunch has the full study. The table above is not particularly informative - it gives allocations specific market not involved - but it is an interesting look at which States are more representative a trade mark or another.
Splatf hat tip.