Two weeks ago I struggled to get the "AdventureWorks 2008" to work on my "SQL 2008 R2" server. I ended up building a 2005 version of it. It appears they have released a beta version of it for the R2 release at CodePlex. Help yourself at your own learning venture.

http://msftdbprodsamples.codeplex.com/Release/ProjectReleases.aspx?ReleaseId=24854

 I'll update this entry and/or have a followup entry as time permits to share my experience.