http://blogs.msdn.com/excel/archive/2007/02/21/data-mining-in-excel.aspxOne of the technologies available in SQL Server Analysis Services is data mining. You can read lots more about it here . We have just released a set of add-ins for Excel ("The Microsoft SQL Server 2005 Data Mining Add-ins for Microsoft Office 2007") thaten-USCommunityServer 2.1 SP1 (Build: 61025.2)