I've come across a good best practices article about scaling out SSAS by Denny Lee and Nicholas Dritsas. It describes how to set up a load-balanced scalable querying environment for Microsoft SQL Server 2005 Analysis Services so that you can handle a large number of concurrent queries to your Analysis Services servers.
July CTP of SQL Server 2008 (Katmai) is out. On the BI side of things: New SSRS Report Engine "Improvements represent the two major infrastructure changes for Reporting Services. Reporting Services enhances the processing engine and rendering extensions to enable new functionality, such as Tablix support, and scalability as well as remove the dependency on IIS. Additionally, new report designer and configuration tool are provided…