For more information on scale out querying architecture with Analysis Services, a new whitepaper can be found on the SQLCAT Best Practices Technet site:   Scale-Out Querying with Analysis Serviceshttp://www.microsoft.com/technet/prodtechnol/sql/bestpractice/scoqryas.mspxDenny Lee, Nicholas Dritsas    

Check out two new Analysis Services Best Practice whitepapers:   Analysis Services Processing Best Practices http://www.microsoft.com/technet/prodtechnol/sql/bestpractice/ssaspbpr.mspx   Analysis Services Query Performance Top 10 Best Practices http://www.microsoft.com/technet/prodtechnol/sql/bestpractice/ssasqptb.mspx