Using a virtual machine in an icecream cluster

As I pointed out recently, I only develop KDE in a virtual machine. It does not only enable me to rollback changes that screwed up something, it also allows me to go back to a verbatim snapshot where I can e.g. be sure that there are no mysterious plugins installed to directories that I have not thought of. I also pointed out that compiling in a virtual machine is slower, because you cannot use more than 2 processor cores per virtual machine. No problem! Use coolo's icecream and build up a compile cluster as described on http://en.opensuse.org/Icecream. I have done it and at the moment my fans are roaring and compiling the KDE for my virtual machine.