Five years ago I built a Windows network using a hardware called Buddy station,where multiple windows(4) run concurrently on one processor, one harddisk and one RAM.
This is because we wanted to cut down hardware cost. I am suppose to build a similar network and the client is laying emphasis on hardware, and power cost, so I conducted some search and ran into this product and I think I will be using it for the client .
Interesting stuff indeed. Other than the issue that a server being a single point of failure, this seams like a very operable solution for many cost related problems!!