There are an overwhelming number of discussions on ESX(i), and similarly so for desktop-based products. Where are all of the Xen users? Have you used Remus to implement "RAID-1" VMs, or taken the next step and utilized this successfully over a lower-bandwidth WAN link? What were the challenges you faced? How well does it work? Have you successfully set up PCI-passthrough for a newer video card to create a virtualized system for gaming? What about setting up two high-performance virtual gaming desktop environments from one physical machine? How about crossfire / SLI? In practice, what were the bottlenecks? Done something else that isn't done easily with another virtualization platform? Talk about it here!