I've released a 64 bit version of parallelknoppix, a live CD that lets you
set up a cluster for MPI-based parallel computing in about 10 minutes,
without installing anything to the computers in the cluster. lam, mpich and
openmpi are all supported. Test reports are welcome, since this is an
initial release and I have limited hardware to test it on. See
www.parallelknoppix.net for more information.