Checking ScottGu's Blog the other day, he pointed to some useful links, I specially like the UrlRewriting library, I'm considering using it so wait for updates for my experience with it. I recommend to check that library it looks really good.
Via ScottGu's Blog
UrlRewritingNet.UrlRewrite V2.0 Released: Albert Weinert sent me mail on Friday pointing me at the new release of the UrlRewriting engine that he and Thomas Bandt wrote for ASP.NET. It is available as a free download and includes samples + full source code.