Microsoft and Nokia's industry-altering announcement of a strategic alliance back in February has today been bolstered with the signing of a definitive agreement between the two companies. In announcing the inking of the paperwork, the Microkia crew point out that they're already hard at work developing "a portfolio" of Nokia Windows Phone devices, which will be shipping "in volume" in 2012, but there's still a twinkling hope that they can get something out on the market in 2011. Nokia devs have started porting key applications and services to Windows Phone, with mapping and navigation getting a highlight men
