Adding RSS to ASP.Net pages
Dmitry Robsman from the ASP.Net team created a RSS toolkit for ASP.Net last year. Its a great little toolkit that makes adding RSS to your website nice and easy.
I use it on a number of my sites, including this one where I take all my blog posts from my three blog type sites and collate them into a single RSS feed using the toolkit.
Very cool, and an ideal project for codeplex too.