Mike Hudack is a tumblelog.

foursquare: Happy birthday, foursquare.

It was exactly a year ago when Naveen and I flipped the switch on foursquare. It was the day before we headed down to SXSW - back when we were still feeling 50/50 on whether people would think the “let’s turn real life into a game!” idea was really interesting or whether they’d laugh us out of…