Silicon Alley Insider's Dan Frommer makes a good point in a recent article that Microsoft should be working on iPhone apps as a hedge bet if nothing else to a) have a more substantial brand presence on fastest growing mobile...

There is little doubt that Nokia -- the once clear leader of the wireless world -- has felt the sting of Apple's iPhone. To counter Cupertino's advances, the Finnish firm launched Ovi, its' answer to the Apple App Store....