I was wondering if there had ever been a discussion on integrating social site into the project? For example, being able to populate the phonebook with your Facebook contacts or even being able to press a button whole watching a movie to check your twitter feed. This could even be extended to allow MCE to update your feed when you start watching a film etc.
Another idea could be a twitdeck-style screen to keep up to date while you're not using the screen, such as listening to music. Also, being able to set your user picture to your Facebook profile picture would be a nice addition.