I occasionally hang out on FreeNode as the user cheboygan. In addition to the Yahoo ID in my userbox, I'm also available for chat on AIM, GTalk, MSN and ICQ.
XEN/KVM virt doesn't seem possible on EC2 (which is xen-based)
LXC/VServer/OpenVZ containers don't support some kernel-level operations (modules, etc) - not sure if this would be a problem, but so much of clusterware runs as root... seems risky to me. also i think we lose a little of the teaching value since the setup becomes less and less like any possible real-life scenario.
QEMU is way slow - i don't think it's feasable
Currently I think UML is best bet
SCAS patches are not yet included in any kernels (ubuntu or vanilla)
Will try without patching host first, for simplicity. I think performance with guest-only SCAS will be sufficient for educational uses. (When I first started doing RAC on VMs it was before x86 instruction set even had virt extensions.)
Will use vnc more for graphical network install/kickstart
Thinking vncserver (not xhost) for graphical environment after startup
Include instructions for putty with port forwarding
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