Rob Conery  is "creating an ongoing series of webcasts and blog posts, documenting the building of an eCommerce storefront using ASP.NET MVC."  As of yesterday, there are 7 installments in the series.  I haven’t gotten around to reading/watching them yet, but they are definitely on my TODO list.  The latest post, MVC Storefront, Part 7: Helpers and Routing, has links to the previous posts as well.