Here are some useful articles from Microsoft on configuring Reporting Services in a failover cluster environment:

http://technet.microsoft.com/en-us/library/ms157293.aspx

http://www.microsoft.com/dynamics/crm/using/deploy/clusteringssrs.mspx

http://msdn.microsoft.com/en-us/library/ms157412.aspx

Legacy Forum Name: Reporting Services in a failover cluster environment,
Legacy Posted By Username: gbeau