Scott Guthrie, bless his heart, has posted one of the longest and most in-depth blog entry I've seen from him in a long time (and most of his tend to be long and full of great nuggets).
This is everything you need to know about the new MVC framework that is coming out from his group soon as an alternative to WebForms (not a replacement). It walks through a typical storefront example showcasing how the MVC does its thing. It's a nice piece of work although you might want to read his overview post which will get you familiar with MVC.
For the record, his post has 5,648 words; 34,768 characters; 146 paragraphs; has 177 comments (so far); and is about 32 pages long.
Now that's a blog post!