In the '90s, the message was "Rock the Vote." Now it's time to "Facebook" it. Starting in September, politicians will be able to buy ad space on networking site Facebook.com, allowing them to create profiles viewable to 8 million members. That should help pols court a group of voters who are hard to reach. Facebookers will be able to "friend" any candidate they like--linking to a profile as they would a classmate's. Facebook says politicians won't pay anything near the tens of thousands of dollars that corporate advertisers do to set up on the site. Politicians should log on, says Markos Moulitsas of the Daily Kos politiblog, because young people "hang out in places like ... Facebook and MySpace," which plans a similar initiative. They're the new town square--great for any candidate who can figure out the online equivalent of a handshake.