For those of you considering developing apps for smartphone (Blackberry, Symbian etc) platforms, we've got some new data from Canalys comparing trends in Q3 2007, Q3 2008 & Q3 2009. As you can see, over the 2 year period both Symbian and Windows Mobile have lost about one-third of their market share, Blackbery has doubled its share and the Apple iPhone's share has rocketed by more than we can work out this early in the morning.