The cluster uses Windows HPC operating system. Many Faces was running on
the cluster using MPI. The Demo used a Cray computer running Windows HPC.
A gorgeous GUI was developed for Surface (by Vectorform) that can talk to
any GTP engine. I made a GTP engine that uses MPI and runs on a cluster,
Dave Fotland, author of Many Faces of Go, would be your best authority.
Windows HPC is an operating system / software package which runs on clustered
hardware - in this case, the hardware used is the Cray CX1 - more info at
http://www.cray.com/products/CX1.aspx
Microsoft might be your best
