I've had more than a few partners contact me with feedback and frustration about the Virtualisation content in the last Microsoft SMB roadshow (November 2009). Be assured I have passed on your feedback and mine to Microsoft and I do hope that they provide some more appropriate and useful content on this important subject soon. As you know, I am no engineer or technician but it's obvious to me that virtualisation is as important for SMB clients as it is at the Enterprise level.
You can get in a froth about virtualisation cos its cool and everyone else is doing it, but utlimately its a smarter way of doing things that can have enormous benefit to your clients. The trick is to get it right and make your life easier too.
In the meantime, check out the Wookie's post on Hyper V virtualisation. This covers many of the gotchas (plus there are a couple of others highlighted in the comments). It also provides links to some other great Hyper V virtualisation resources, information on licensing and even provides info on other SMB appropriate virtualisation platforms.
I'd encourage you to post links to any other good resources in your comments so they can be shared with others.
Keira McIntosh is the General Manager at Directions Technology - an Australia owned small business providing managed and reliable IT Support in Brisbane. You can also find her on Twitter and Linked In.