Why not find another way to reduce productivity and kill time. I joined Twitter: http://twitter.com/mcalbucci
Twitter doesn't let me import my contact list from a CSV file, only from online web-based email services, and since I don't use GMail, Yahoo or Hotmail I don't have an easy way to see which of my friends are on Twitter.
Do you know any app that would make it easier for me to find who's on Twitter based either on a CSV file, or on my Facebook/LinkedIn profile?
What I would do is to create a Gmail account, and then upload your CSV file to that. Then you can use that to get your contacts in to Twitter. Kind of low tech, but it should work.