I use Unitrends Enterprise Backup Free Edition - gives me 4 VMware vSphere and Microsoft Hyper-V VMs (I use this in my lab at home) and *automated* backup and archiving - the automated is key - it lets me set and forget. I plan on getting a VMware VSP certification just so I can get the NFR one mentioned above that will let me do unlimited VMs and protect a terabyte of data.