These are essential apps in the modern, Social Networking, Web 2.0 world. I personally am a facebook-ite, but I know some of you out there favor Myspace (especially you younger people), or, Twitter. Now, both Facebook and Myspace have their own, independently developed programs that they released a while back for the app store. These two apps are very well developed and are incredibly user-friendly, in fact, being the definitive app for their respective services have made both of them extremely popular. Twitter on the other hand, has a multitude of programs, one worse than the other. If I were you, I'd make the leap to a fully featured service rather than continue on with Twitter, but if you'd rather carry on, Tweetie is a perfectly good app for that service.