The problem with social software as a recommendation network has its roots in the problem of social software itself. ‘Friend’ is a pretty blunt instrument when it comes to describing relationships, especially in matters of taste. The sad reality is that most of my friends have rotten taste in music (I don’t hold it against them), while the music recommendations I actually follow are mostly from people I’ve never met, be they Rhapsody editors or MP3 blogs. Same for virtually every other narrow category where I need advice; odds are that the real subject matter experts aren’t anyone I know.
(Via The Long Tail.)