Please don't top-post with fully quoting all previous content. This is a mailinglist.
Proxmox VE is based on Debian. What does this have to do with CentOS? As it makes use of KVM you can run CentOS on top of it as a virtualization guest.
Alexander
CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos .
Also ESX(i) is not CentOS related but is included in this post.
And what about oVirt?