
@show me another
I hope you virtualizers are putting money into FOSS projects too. I already run Qemu images on Windows, Linux & OSX of Plan 9, Linux & Windows2k which I can control via the Qemu console or the virtual serial port (plan9 is particularly suited to this - no surprise there).
I'm not pretending to know anything about datacentres or speed comparisons etc. but money into FOSS is an investment, even if it just keeps competition around for the highly financed ventures.