I haven't completely tested it but I wanted to try and get it online (rather than started, and then never quite finished).
You should see an option now to "Thank" people for their posts. This is a lot like a "Like" on Facebook.
There is a small, gold, thumbs up at the bottom of each post (other than your own). Click the thumbs up and you've thanked, or liked, the user's post. There is a rating system based on your number of thanks compared to who ever has the most (I think that's how it works). I might wind up turning the rating system off, we'll see.
There is also a "Thanks list" at the top that shows how many thanks people have both gotten, and given.
Like it? Hate it? Thoughts?