I'm a Luddite... I'm not on Twitter or FaceBook yet. (I will be someday)
At CPAC last week, I sat in the audience next to a friend from California who was Twittering away on her iPhone and was getting the "inside scoop" on what surprise guests were going to appear at CPAC, etc. I was SO impressed! Now I understand why everyone loves Twitter.
Believe it or not I am newbie on both Facebook and Twitter LOL! for 3 months now