I think this is interesting, although I don't think it would be a deal breaker for me.
Perhaps unlike yourself ByronM - my facebook network is a combination of friends from school, university associates, work colleagues, and probably a fair few randoms from along the way.
Will my online needs be better served by sources which that motley crew have found useful? I'm not sure.
I also think (or perhaps, like to think) that most of my queries may be a bit unique / long tail to benefit much from something like this, but could well be proven wrong.
Maybe to get the best value out of something like this, I need to make a new facebook profile, and only make friends with the small number of people whose opinions I genuinely trust! Either that, or I need to become more trusting in general.
I think one problem for me, is when I'm searching, I like to feel like I'm am the master of my own destiny. I'll often look for people's recommendations on a restaurant, or an exhibition for example, but I'm perfectly happy scanning through the already significant number of reviews and ratings posted online by people I've never met. At least then, when I make a bad decision, I've only got myself to blame.
I'll definitely give this a look tho. And regardless of the poor taste most of my friends have, this is a great innovation from Bing.