The SQL Server 2005 Data Mining Add-ins for Office 2007 allow you to uncover hidden patterns and relationships in your data and then put them to work to enhance the quality of your analysis. To use the Microsoft SQL Server 2005 Data Mining Add-Ins for Office 2007, you must be connected to a SQL Server 2005 Analysis Services database. However, you don’t need to have prior experience with any SQL Server 2005 Analysis Services components.

This is the extract from the http://www.sqlserverdatamining.com/DMCommunity/_DMAddinLaunch/default.aspx article where you can the whitepaper and a simple walk through.

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