My personal answer, no, do not use it for production. It is a very good devlopment and testing tool, but I would personally not use it as a production server. Say you had 2-3 virtual servers running mission critical applications. All that would have to happen is the main machine crash and now you lost 3 servers and not one. As much as hey are not suppoer to effect each other, would hate for one virtual setting to hang the rest of the machine.