reference url: http://geekswithblogs.net/sdorman/archive/2008/08/30/team-foundation-server-ndash-how-does-microsoft-uses-it.aspx
Team Foundation Server Reporting and Visio 2007(Reference From Teams WIT Tools)
TFS Report developer resources(Reference From Teams WIT Tools)
Reference URL: http://blogs.msdn.com/teams_wit_tools/archive/2007/03/26/tfs-report-developer-resources.aspx