Well, almost. Sun has finally worked through all the regulatory issues and now developers, researcher and just about anyone from 24 countries across the world can take advantage of Sun's Grid Compute Utility available from Network.com for $1/CPU hour. What's more, if you sign up now, you will get 200 CPU-hrs free.
Why build your own grid for your research when you can let someone else worry about the systems? Now you can concentrate purely on your research or development.