I have succesfully run Xen on 2 of their root servers for 3-4 years (with 5 to 8 virtual machines on each), ending this episode only recently (not because of te

I have succesfully run Xen on 2 of their root servers for 3-4 years (with 5 to 8 virtual machines on each), ending this episode only recently (not because of technical difficulties). There were some occasional problems with Xen itself (some virtual machines went to zombie state from time to time - I hope Xen is more reliable nowadays), but nothing in connection to a hosting provider.