Well the definition of "smartphone" is as the industry defines it. Gartner, Canalys, etc....they all lump the iPhone, Windows Mobile devices, Treos, RIM/Blackberries, Nokia's, etc into that same market segment. I'd say the iPhone is closer to any of those than it is, say, a Razr.
Apple certainly classifies it as a smartphone...hence Steve Jobs standing under a giant pie chart at MacWorld 2008 proclaiming 20% (at the time) market share of the "US Smartphone Market."
And we all know....Stevie is NEVER wrong.
