If like me you've been wondering if any of the jesusphone people are lookin at your site on their strangely-crippled versions of Safari, it seems that there is no consensus on precisely which user-agent the iPhone is identifying itself as. Matt Cutts says it self-identifies as:
Mozilla/5.0 (iPhone; U; CPU like Mac OS X; en) AppleWebKit/420+ (KHTML, like Gecko) Version/3.0 Mobile/1A543a Safari/419.3But elsewhere the guidance is that screen resolution reports in Google Analytics is the best/easiest way to ferret-out the iPhone traffic on yr site. Hmm...

My name is Dan Klyn, and I'm an information architect.
I work with amazing people at a nonprofit company called Flannel in Grand Rapids, Michigan.
I also teach IA in the library science programs at the University of Michigan and at Wayne State University.