This is a pretty good VPC to explore the capabilities of VSTS.   It comes with 38 hands-on labs and sample data.  And it won't expire till 12/31/2008.  Get it here:

https://www.microsoft.com/downloads/details.aspx?FamilyID=c7a809d8-8c9f-439f-8147-948bc6957812&displaylang=en