If you’re on the workspace-announce list, you will have already seen the “Science Cloud Available at the University of Chicago” email.
Built with the workspace service, we’ve made some nice client enhancements to get to “cloud simplicity” and it’s up and running on 16 nodes and already serving guests. See the the documentation for command samples, the idea is to make it as simple as possible. On the service side, Nimbus uses TP1.3.1 with some very small additions (mostly this differs because of a new authorization plugin). Building cloud computing solutions is the main business of the workspace service.
Have a look!
[UPDATE: using TP22.214.171.124 now which enables one-click clusters]