Enablers. “If you didn’t hear, yesterday Charlie Sheen joined Twitter. Today he very well may reach 1 million followers (as I type he’s already passed the 900K mark). How did it happen? Why all of a sudden did he wake up and decide it’s Twitter time? And how was it that Charlie Sheen went from non-twitterer to hardcore twitterer overnight? Short answer: he got a lot of help from a team of experts at Ad.ly, a small Beverly Hills start-up that focuses on celebrity endorsements via Facebook and Twitter.”