What do you guys think about facebook/twitter integration in games (like game status updates)? Do you guys think they're useful or fun, or do you think they're useless and annoying? Do you enjoy them more for hardcore games (Uncharted 2, for example) or casual games (like Doodle Jump for the Iphone). Any thoughts?

(I'm collecting information for a university project, so any responses will be very much appreciated. Also, if anyone is interested in a quick one-on-one message "interview" on this subject, that would help me tremendously. Thank you!)