So they're going to move to OpenStack Compute but... which supervisor are they going to use? I guess is not VMware (KVM? Xen?), but I still find the article a l

So they're going to move to OpenStack Compute but... which supervisor are they going to use? I guess is not VMware (KVM? Xen?), but I still find the article a little bit confusing. Besides the quotes suck ("OpenStack is not really free"; well, if you don't know how things work you'll have to pay who knows), so I'm not sure if I can trust that information.