While we've yet to see the rollout of Microsoft's Surface
, rumor has it that other versions have at least made it to the prototype stage. According to ZDNET's sources, Microsoft has a "spherical Surface prototype" bouncing around the Redmond campus. What's intriguing is how they managed to stuff a rear projection unit and IR cameras into a ball. Presumably, we're talking about a different touch-sensitive technology to that used in the table-top surface. You know, assuming the rumor is true.