Surprised no one has posted their thoughts on this. To me, it seems a bit pre-mature. MSN itself has a lot of work to do with its index, and now adding contextual advertising just seems to be a bit much for them. I know they want to hop into the game with Yahoo and Google, but I think they're biting off too much at once. I like the fact that their back link searches are the quickest around, and their indexing is fast, but their are a lot of issues with relevancy and spam that prevent the engine from being so much more. They're taking the right steps, but they need to take more IMO.