I'm not sure how much content or architecture talks about previous versions of IIS were available but there are TONS about IIS7. The three webcasts listed below are from the past year. They do a great job covering a bit of history where IIS came from and discusses where it is headed. I've known Scott Guthrie since 2000, he does a great job explaining how IIS and ASP.NET are integrated together to make it even more powerful. My favorite was the .NET show, the first part "introduces IIS7", the second part gets into demos and other things. Bill does an excellent job showing the power of IIS7. Thanks guys for taking time to speak and make this content available.
The .NET SHOW: Robert Hess interviews Bill Staples and Scott Guthrie about IIS7
http://www.iis.net/default.aspx?tabid=2&subtabid=23&i=1035
Talking ASP.NET and IIS 7.0, Part I
http://channel9.msdn.com/ShowPost.aspx?PostID=44084
Talking ASP.NET and IIS 7.0, Part I
http://channel9.msdn.com/ShowPost.aspx?PostID=44084
Talking ASP.NET and IIS 7.0, Part II
http://channel9.msdn.com/Showpost.aspx?postid=44940
Checkout the TechCENTER at http://www.iis.net
Steve Schofield
Microsoft MVP – IIS
Pondering Thought 