Microsoft Tech Center Reston - http://www.microsoft.com/mtc/locations/Reston.mspx
Microsoft Research - http://research.microsoft.com/
Microsoft Surface - http://www.microsoft.com/surface/index.html About Surface
3D Live Maps - http://maps.live.com/ Click on "Install Virtual Earth 3D" in the lower left corner to install 3D viewer.
Windows Live - http://home.live.com/ (sign-up may be required)
Source for traffic data - http://www.traffic.com/ Live Search http://www.live.com/
Unified Communications - http://www.microsoft.com/uc/