Microsoft’s Steve Ballmer’s Entire Letter to Customers About Cloud Computing | Kara Swisher | BoomTown | AllThingsD (Posted at 4:45 PM PT on October 28, 2008 Kara Swisher) With all the information Microsoft is releasing at its launchtastic Professional Developers Conference in Los Angeles this week, CEO Steve Ballmer sent out a honking long missive to customers who have opted into the software gia