MESH: SSO via SSH public key authentication

Project Page: http://ti.arc.nasa.gov/opensource/projects/mesh/

"Mesh is a secure, lightweight grid middleware that is based on the addition of a single sign-on capability to the built-in public key authentication mechanism of SSH using system call interposition."

That sound pretty awesome actually. I'm surprised ssh isn't used more often to create things like this. Could be a big help in the virtual organization world of research.