I’m a big, big fan of Conan O’Brien, and I was already starting to chuckle as he introduced a new bit on the Tonight Show called Twitter Tracker. The show focused on the CelebTweets from Ashton Kutcher, Dennis Haysbert from CBS’ The Unit and Major League, and Miley Cyrus. The punchline is how a mundane tweet (i.e. “Waiting in line at Starbucks”) could actually make us feel like we’re plugged into someone’s life. According to comScore, at least 9.3 million United States unique visitors were tweeting in March ’09.

The very witty and super-talented vlogger HappySlip did a similar video on how addicting it is to read Facebook updates. As a counter-point to all the hype, I ran into an old high school friend and asked if she kept in touch with anyone. She responded, “Not really. I guess I could through MySpace or Facebook, but I think those sites are a waste of time.” And I really dig Patrick Allmond’s response to Adam Ostrow’s Twitter Tracker post on Mashable: “Before you have a second life, make sure you have a first.”