Business applications still seem reserved for large scale manufacturing, large budget technology systems, or the complete opposite side of the spectrum as toys.  The true personal assistant robot has yet to really become a reality unless you need your floor vacuumed.

Links

Microsoft Robotics Developer Center (http://msdn.microsoft.com/en-us/robotics/default.aspx)
Microsoft Robotics Developer Studio Forums
Microsoft RDS Express 2008 R2

Lego Mindstorms (http://mindstorms.lego.com/eng/default.aspx)