Most non-techsters will know him as Justin Timberlake in The Social Network.
Sean Parker, cofounder of Napster and Plaxo, is also the founding president of Facebook, which is probably why he's never had a Twitter account.
Sean Parker is now gaining new Twitter followers every second (he's gained several hundred while writing this post). So far, he has just one tweet:
Sorry Zuck, I had to do it eventually. (Actually @scooterbraun made me do it.)
Sean has had a Facebook Page for a while with an enviable URL and 30,000 subscribers. We'll see if he continues to maintain or catches the Twitter bug. Either way I fancy he'll fetch a lot more than 30,000 followers.