In 2010, I used foursquare backdoor to leak my latest location to my website menu area. It appears now that I cannot fetch page in my python script. Not sure what is happening, but I am in a hurry to spend too much time on this.
No problem though, with the help of awesome service Yahoo Pipes, I introduce a proxy to this picture:
UPDATE: backdoor is closed after all. Foursquare doesn't publish latest location in search results any more, but rather declared user's hometown.