You can get the description of each Integration Pack from the below link:
Configuration Manager
http://blogs.technet.com/b/opalis/archive/2010/08/31/introducing-the-new-configuration-manager-integration-pack-activities.aspx
Virtual Machine Manager
http://blogs.technet.com/b/opalis/archive/2010/08/31/introducing-the-new-virtual-machine-manager-integration-pack-activities.aspx
Data Protection Manager
Service Manager
http://blogs.technet.com/b/opalis/archive/2010/08/31/introducing-the-new-service-manager-integration-pack-activities.aspx