SQL Server TechCenter

Please take some time to look at the SQL Server TechCenter http://www.microsoft.com/technet/prodtechnol/sql/default.mspx, particularly the SQL Server 2005 Business Intelligence section http://www.microsoft.com/technet/prodtechnol/sql/2005/BI/default.mspx which has some great information on Analysis Servers and Integration Services.  The SQL Server 2005 homepage http://www.microsoft.com/technet/prodtechnol/sql/2005/default.mspx also has a plethora of useful whitepapers. 

You can also subscribe to the SQL Server KB / downloads RSS feeds on TechCenter http://www.microsoft.com/technet/prodtechnol/sql/default.mspx (I find Sauce Reader to be the best tool out there http://www.synop.com/Products/SauceReader/)