I know this is more of a JCF improvement idea, but how about the ability to "like" somebody's reply or thread. Rather than having to say I second that, or I agree with that, why not have a "I second this" button and it'll display who seconds that post or thread?

Sorry for my grammar, btw. I'm tired :P but seriously. I know it sounds very Facebook-ish but I think it would work out quiet nicely.