Perry, I'll find out the exact versions and LUN configuration if only because I want to know and am a little worried we might be missing a trick here.

I would be pretty sure most of the other vms would be application servers. We have not virtualised many SQL servers and those we have are small 3rd party apps that run quite happily on a physical server with a C drive for OS and an E for the databases, data and log and backup (with TSM to offsite). This one app of that type did not perform on vmware would be the busiest of these small apps we support.

I am quite interested in making use of virtualisation where possible, though I admit my main driver is the DR advantages it offers.