The VPC includes the MOSS Product Evaluation Guide (on the desktop) and is configured so the walk through at the end of the guide works with the image.

Direct Download Link: http://www.microsoft.com/downloads/details.aspx?FamilyID=67f93dcb-ada8-4db5-a47b-df17e14b2c74&DisplayLang=en

TechNet VHD Landing Page (A link to the MOSS VPC will appear very soon): http://www.microsoft.com/technet/try/vhd/default.mspx