360i's David Berkowitz confesses his addiction to Foursquare. As a Super Mayor he's got some insight into the application and why it can be so addictive to so many people. If you're on the fence about Foursquare, there's also some good insight into how you might find it useful for yourself or your business.

PR recruiter extraordinaire Lindsay Olson also offers some additional perspective on the value of Foursquare to PR and marketing folks like us.