I was a developer on the IIS 6 team ( Windows Server 2003 ).  I am no longer on the IIS team, but I try to pay attention to what they are doing.

The below webcast on the 15th looks like a great resource for understanding the evolution of IIS reliability strategy.

http://msevents.microsoft.com/CUI/EventDetail.aspx?EventID=1032241725&Culture=en-US

Plus - Chris Adams is an interesting guy - I can't think of a time when he wasn't carrying around a football around the office.