Wow, we have to hand it those Nokia social media types, they're on top of their game. A mere couple of hours after Stephen Elop and Steve Ballmer took the stage in London, the video of their joint announcement of a Nokia-Microsoft partnership is up and ready for repeated consumption. For those of you just catching up now, Windows Phone 7 has become Nokia's "principal smartphone strategy," MeeGo is getting transformed into an experimental "learni