PHD does XenServer at HOS level and has much better pricing than Veeam (which of course doesn't have XenServer HOS level support - nor does my company Unitrends.)
Scott - this shows my ignorance - but figure I'll ask - when you say Xen and XenXerver have merged - do you know if this means that the snapshot mechanisms of XenServer that were missing in Xen are now in both?
P.S. To everyone, will again note - probably tiresomely - that Unitrends (my company) can do GOS-level backup (treating VMs as physical machine.