Proxmox Virtual Environment (VE), the linux Debian based distribution for managing KVM and Openvz, just released it's 2.0 Beta version adding High Availability support and packages based on qemu 1.0. Along with the new high availability features comes an updated GUI for managing your HA settings and a new Datacenter summary page.
Proxmox VE has always provided good community support by way of an active forum, wiki and community bug reporting. The proxmox team have now added a youtube channel where you can find the latest tutorials and howtos on installing and configuring your virtual environment with Proxmox.
You can download this latest release at the Proxmox Download Center.