With the amount of people using Facebook, millions of users are used to seeing it already every day. The button just may take off as the popular way to give your stamp of approval on something whether it be a restaurant, charity, or business on many other sites in the near future.
With all the "liking" going on, it's no wonder marketers are talking about the information Facebook will be gathering to target ads at users. This leads us to the inevitable issue of privacy. Analysts tell the New York Times that privacy concerns are always possible as shares more details about users with external Web sites, though that does seems like a more general issue than a specific flaw in the "like" service.
Facebook denies the claim that they do not track users unless the users fill out information in their profile.
