Craig Shoemaker just posted the latest episode of the Polymorphic Podcast: ASP.NET SEO - Interview with Michael Neel. Yes, I've now appeared in a podcast that I didn't have a hand in recording!
Even if you don't listen to the show (and you should, Craig does an awesome job) check out the show notes. SEO - or Search Engine Optimization - is one of those areas developers tend to overlook or outright ignore. I think this is partly because it's not something we think about when knee deep in site code, but also because there is a stigma attached to SEO that it is dirty marketing stuff. Truth is, a good design for SEO is also a good design for users and helps more people find what they need (I was glad to see StackOverflow realize the sitemap protocol is very helpful).
One thing I mention at the end of the podcast (at least I think it's the end - I haven't listened to it yet!) was the new support from System.Web.Routing to handle some of the code I have written myself in mapping urls to content. Wally McClure has just recently posted an ASP.NET Podcast on Routing with WebForms that explains the new API.