Noah Winer, one of my good friends (and former college roommate) stayed with me last weekend. Noah has worked for MoveOn.org for several years as their Campaign Director. If you subscribe to any of their mailing lists, chances are you get emails from him all the time.
Noah's a really fun and funny guy, but he's got his serious game face on in this video.
(By the way, MoveOn is probably one of the most successful and creative viral/email marketers in existence. Their 3.3 million members are incredibly active, send millions of letters, emails, and faxes to support MoveOn's mission, and they've repeatedly shown their ability to raise millions of dollars from small, individual donations, in mere hours.)