A week ago Facebook launched Places, the social network's entry into location-based marketing. Partners Foursquare, Gowalla, Yelp and Booyah appeared onstage and talked up their cooperation with the giant.
Now that the Places service has been live for a week in the US, how is it changing our checkin behaviors? And what does the announcement mean for location-based marketing generally?
At the Places announcement, Foursquare and the other partners were quick to point out that Facebook was bringing checkins into the mainstream.

