I don't know if Facebook has this feature (probably), but on Orkut you can assign friends to Groups, like Family, Co-Workers, Best Friends, etc...
It would probably solve your problem if an option to "Only consider the opinion of these Groups" were present. Of course, we'll fall into the problem of how noteworthy their opinions are depending on the subject. While I would trust my middle brother expertise on digital cameras, the youngest in the house is a chef, so each one should weight differently.
Something so complete will never happen (never is a dangerous word), because that would require other people to constantly input information like "I trust Gustavo's opinion on digital cameras", and even that isn't enough, because my brother is a professional photographer, and isn't the best person to ask if you want a cheap camera.
So, I don't think any of these "other people you know liked XYZ" will manage to give you things that you'll probably like (I enjoy different types of japanese food than my brother, for example), but they will help you socialize more. You'll at least know that your friend went to some restaurant, and tell him later about your experience.
It would probably solve your problem if an option to "Only consider the opinion of these Groups" were present. Of course, we'll fall into the problem of how noteworthy their opinions are depending on the subject. While I would trust my middle brother expertise on digital cameras, the youngest in the house is a chef, so each one should weight differently.
Something so complete will never happen (never is a dangerous word), because that would require other people to constantly input information like "I trust Gustavo's opinion on digital cameras", and even that isn't enough, because my brother is a professional photographer, and isn't the best person to ask if you want a cheap camera.
So, I don't think any of these "other people you know liked XYZ" will manage to give you things that you'll probably like (I enjoy different types of japanese food than my brother, for example), but they will help you socialize more. You'll at least know that your friend went to some restaurant, and tell him later about your experience.