go description of Facebook's Beacon:
Facebook’s importance as a platform that facilitates business rather than just socializing has been growing day by day. Recently, it has announced that 44 websites are using Facebook Beacon, which allows users to share information from other websites for distribution to their friends on Facebook.
Beacon is the targeted advertising system of the Facebook. Very soon when Beacon is linked to eBay , the business horizons of Fecebook users will further expand to unimaginable levels.
Facebook suggests that reaching millions of people is just 3 lines of code away. With Facebook Beacon, Web site owners can simply determine which user actions they would like publish to Facebook. Beacon supports actions including purchasing a product, signing up for a service, adding an item to a wish list, and more.
>> more: http://internetcommunications.tmcnet.com/..es/15075-websites-look-shine-with-facebook-beacon.htm