The Rocky Mountain Windows Technology User Group is hosting a Virtualization Mini-Conference in Denver on September 29, 2008. The event will showcase Microsoft Hyper-V as well as VMWare ESX Server. Both of these technologies will be running on true server class hardware for demonstrations so you should be able to get a true "feel" for how these would run in a production environment. The event is free of charge, but registration is required. To get more updated information about the conference as well as register, please visit http://www.rmwtug.org/Virtualization_Event.htm.
I will not be presenting on this myself, but I will be in attendance so I hope to see you there if you can make it.