The purpose of the integration is to create collaboration sites on SharePoint 2007 as new accounts or opportunities are created in Microsoft CRM.
Whenever a new account or opportunity in Microsoft CRM is created, a workflow will be triggered. The workflow will execute a .NET assembly called “{SomeName}.dll”. This assembly is responsible to create the corresponding collaboration site on SharePoint server.
http://www.codeproject.com/useritems/MOSS_2007-CRM_Integration.asp
