Are you perhaps considering upgrading your DCs from Windows 2003 to 2008 R2, but you want to kick the tires of some of the new features available in it and Windows 2008? I’ve got a resource for you.
Doing some other research, I found that TechNet Virtual Labs has a good amount of resources on AD features in W2K8, like
There’s also good stuff on existing W2K8 features:
These are well worth 90 minutes (probably less) of your time. Ironically, the Virtual Labs don’t have what I was looking for - a lab on Hyper-V virtualization :-/.