Don Box has an episode of MSDN TV _place_holder;about using XPathNavigator. If you read his blog, it isn’t particularly new stuff, but it was nice to hear him talk about it. Also, I think he explains WHY XPathNavigator is better than other choices in a way that makes more sense than what I’ve heard before. Good stuff.
BTW, did anyone else notice that Don was using emacs? I thought he gave up on that? :)