These are MUST read articles if you are involved with IIS7 development or administration.
The Windows Vista Developer Story: Internet Information Services
http://msdn2.microsoft.com/en-us/library/aa480184.aspx
The Windows Vista Developer Story: Run-Time Status and Control (RSCA) API
http://msdn2.microsoft.com/en-us/library/aa480205.aspx
The Windows Vista Developer Story: IIS Manager
http://msdn2.microsoft.com/en-us/library/aa480180.aspx
The Windows Vista Developer Story: IIS Modules
http://msdn2.microsoft.com/en-us/library/aa480181.aspx
Steve Schofield
Microsoft MVP – IIS
Pondering Thought 