It'd be nice to mark a post with a big "Yes!!!!," "Rock On!!!," or something to indicate you think they're completely spot on with what they said. A button like Hugs and Thanks so you don't have to add a post. Being able to track these stats like "number of hugs given" can give folks some much needed encouragement too. It's sort of like "Thanks for this," but not quite as personal - more of a public exclamation of "You nailed it! Everybody should read this!!!!!"