What's an example of a reasonably modern, well-designed, fairly complex ASP.NET webforms site, with source code available? Particularly that use MVP or MVC patterns.
Note: I'm not looking for sites that use the ASP.NET MVC framework. I'm looking for sites built with traditional webforms, even if they happen to use the MVC pattern
As for MVC, it's more of a tutorial, but NerdDinner is a pretty good app/tutorial. MVC is quite new, so good well-architected, free sites aren't as common. I'd love to see a few. There's a PDF with NerdDinner that walks through the application.
For Webforms, XD World Recipes is a well-architected n-tier application. It's a bit old ( 2 years ), which makes it nice for learning the basics of N-Tier, before we had all the syntactic sugar of Linq etc.
Take a look at Testable DNN Module - it is implemented using the Web Forms MVP framework. For further information on web forms MVP, I would recommend listening to the following Hanselminutes podcast.