In this post you will find Internet Resources referenced during the ConfigMgr 2007 Class.
RegkeytoMof 3.0 and Instructions on Using Regkey to Mof
List of tools and scripts for ConfigMgr
Admin Studio for Configuration Manager 2007
Troubleshooting "Waiting on Content"
Jason Lewis Blog – SCUP and DCM
OSD on Technet
Step by Step OSD on Technet
Quest Management Xtensions