I don't think it will end up where one wins out over the other. I see Facebook primarly as a networking tool, where as I see twitter as a messaging framework.

I don't think it will end up where one wins out over the other. I see Facebook primarly as a networking tool, where as I see twitter as a messaging framework. Yes facebook can pare down services to allow real-time messaging and they certainly will, but I think it'll be difficult to start building a place for developers to play and create. Whereas Twitter intially things open and encourages others to create their features. They are focusing on making their service as reliable and simple as possible. Want more features, well there is an web app for that.