Microsoft to destroy cell phone business

Here is an interesting development: Microsoft plan to offer a Skype-style free internet voice service for mobile phones from wi-fi enabled phones running Windows Mobile software. This is similiar to a recently unveiled Skype phone that look like a standard cell phone but work over wi-fi. If cities offer free wi-fi services this technology could send many telcos broke (bad for their stock price). Free wi-fi is just starting to be debated in the US, with Philadelphia pushing ahead and NY holding out (although it is currently free at Bryant Park).