Scott Hanselman: ASP.NET MVC and the new IIS7 Rewrite Module

"Last year I noticed that there were 11 ways to get to my blog. Literally 11 different URLs and it wasn't helping me my ranking in the search engines. I wrote about this in detail and how I used ISAPI_Rewrite to fix it up. Fast forward to this year and the IIS7 team has been taking advantage of IIS7's modular design to release a bunch of new modules out-of-band."