“should be replaced by an iframe showing recommendations for the abc website.” Rendering the code currently just displays an iframe with the Facebook.com website in the frame. I am assuming when they turn it on to the world that will render something completely different.
If my theories (and a few sources close to Facebook) are correct, Facebook will soon be releasing the ability for any Facebook user to provide recommendations and advice on any website that integrates the recommendations widget. Think Google Sidewiki, but at the discretion of each website. The functionality I am guessing will work similar to that of Foursquare’s “Tips” feature.
What makes this feature even more interesting is what this could bring if some of the rumors of GeoLocation being launched are true. Is this just a sidewiki feature, or could Facebook be getting ready to launch a Geolocation feature, enabling “Recommendations” that go beyond just websites into real-life locations and places?
Be sure to read more about FBML, including a very beginner lesson on XFBML, in my book, FBML Essentials.