I'm Using KVM to virtualize OpenBSD 5.2 right now. I'm not that impressed about Vmware. I used a esxi server for 2 years extensivly. Things i didnt like : cli,closed software,bloated,technical documentation,gui. Not that KVM is much better at this point,but at least, i have the sources. problems i found using kvm and openbsd: SMP not working as it should. spice and qxl is not that good right now. No virto drivers for openbsd(disk i miss the most) Virt-viewer (remote spice viewer app) has some annoying keyboardlayout obfuscation. And with a look in the future i dont think the problems are going to to be solved. A recent article on phoronix.com had information about qxl getting KMS support. Correct me if im wrong, but this seems quite linux only to me.
Non the less, i use KVM right now for a few OpenBSD,Linux and Win8 Maschines and overall it performs quite well. One of myinterests are VDI solutions, for that i will check citrix (xen) as an alternative in the future. --send from mobile
