The final technical note as part of the Building and Deploying Large Scale SQL Server Reporting Services Environments technical note series on Reporting Services Performance Optimization has just been published at Reporting Services Performance Optimization.
This technical note provides guidance on the reasons to use 64-bit, how to handle large workloads, Monitoring Reporting Services (which includes a link to a sample SSRS project to view the ExecutionLog2 view), and Memory Configurations.
Enjoy!