Try:

sinfo, which gives an overview of nodes in use.

sacct, which can be used to list jobs in the queue. Try sacct -a -s R,PD to see a list of running and pending jobs.

Log in to the UCHC VPN to visit these sites:

http://ganglia.cam.uchc.edu/ganglia

http://xdmod.cam.uchc.edu:8080/

If you can't access the VPN, first try updating your password. Your password expires every six months, but if you only log in to Xanadu directly, it will never prompt you to update it.

If you need to figure out how access the VPN, see here.