ASP.NET MVC request pipeline in-depth

http://stephenwalther.com/blog/archive/2008/03/18/asp-net-mvc-in-depth-the-life-of-an-asp-net-mvc-request.aspx

 

ASP.NET URL Routing

http://blogs.msdn.com/mikeormond/archive/2008/05/14/using-asp-net-routing-independent-of-mvc.aspx