Customer Reviews: Is Facebook the New Foursquare or Yelp?

In a matter of weeks, Facebook became much more than a place where old high school friends kept in touch, talking about things they "like" with one another. The introduction of Facebook's Community Pages combined with the social media site's launch earlier this year of Places, a location-based service, has put the relevancy and longevity of other outlets like Foursquare and Gowalla into question seemingly overnight.