Scrabulous aside, I often recommend that teachers and administrators setup at least a basic facebook profile. News out of Manitoba today reaffirms that idea...
http://www.theglobeandmail.com/servlet/story/RTGAM.20080506.wlfacebook
Stake your claim to your digital footprint before someone else does! Incidentally, if you aren't the #1 hit on a google search of your name, are you comfortable with the person who is???