I've previously deployed XEN (and VMWare) in a production environment, with quite high I/O workloads. This solution works adequate but I feel that the project might have lost its momentum.

Now that Ubuntu seems to have opted for KVM as its main virtualization platform, and I want to start using Ubuntu as the base OS for most Linux installations, I wonder if anyone here has used KVM with the new virtio drivers in a real production environment?

I guess performance should be somewhat close to XEN, at least the IO, I'm more concerned about stability issues and corruption bugs.