I like the recommend feature that is attached to each post, even though I don't see how you guys are putting it to work yet. That being said, could there be a link for the exact opposite of a recommendation in the cards?
I think it would compliment the structure of these types of sites nicely, as there's no negative feedback given for slanderous posts or unfounded claims, only a "lack of recommendation".
I spend a lot of time on sites like www.quora.com and I feel like the up/down vote as opposed to strictly upvote helps to sort the legitimate response from the.... crap. Love the site and can't wait to see what the guys have planned, keep it up!