Facebook as Professor's Office?

Cliopatria points to this New York Times article about how professors are utilizing social networking in a variety of ways. Recent graduates contacted me via Facebook as I was just exploring without really "friending" anyone and, so far, it's been an excellent way to keep in touch with them - esp. given that the accrediting agencies actually expect us to know where they are even after they leave us. From scanning the article, it is okay for the men to reveal more personal details but my guess is that the double standard still applies to female interaction with students.