This reminds of an article I read many years ago about the Facebook's and Google's approaches to organizing information. The article argued that Facebook seeks

This reminds of an article I read many years ago about the Facebook's and Google's approaches to organizing information. The article argued that Facebook seeks to organize data in the context of human relationships. I wonder if the future of online reviewing will be one where people on trust reviews left by people they know. Facebook supports leaving reviews on company pages (AFAIK) but overall it seems like they haven't put much effort behind making a robust reviewing system. I can easily see them coming to dominate this market though.