Having a go at tidying my desk and had to share this Best Practice info before I filed it:
Server Clusters are also commonly referred to as Microsoft Cluster Service (MSCS), Failover Clustering or Wolfpack Clustering. When searching for Server Cluster KB articles, include the keyword 'MSCS'.
Some great Best Practices can be found here:
Server Clusters: Cluster Configuration Best Practices for Windows Server 2003
Best Practices for Securing Server Clusters
Network Configuration Best Practices for Windows 2000 and Windows Server 2003
Server Clusters: Storage Best Practices for Windows 2000 and Windows Server 2003
iSCSI Cluster Support FAQ