Looks like Foursquare, as one twitterer put it, "has ousted Facebook as the Mayor of Downtime".
Down for more than nine hours, stalkers and random creepy friends had to return to the old-fashioned way of stalking their prey, by physically following people, instead of relying on Foursquare's services.
I am rather miffed because I was about to the Mayor of the toilet in my Tokyo hotel. Now I have to start all over again.
I am told that Foursquare users desperate to check in had to resort to calling all their friends by phone every few minutes to announce every move.