The System.ServiceModel.Syndication Namespace
I'm working on a WCF in Orcas presentation, and I just stumbled across a really easy way to consume RSS/Atom feeds. The assembly is used to generate feeds, but it can also be used to consume them. It doesn't have to be a WCF application.
He also gives us some code to consume an RSS feed! This is great stuff - I had no idea that there was such strong support for RSS in .NET 3.0!
Update! No wonder I had no idea! It's not in .NET 3.0! It's part of the Orcas (.NET 3.5) release. Guess I'll have to wait a while before I introduce this into production code. :)