I would like to see a way to +1 or say Thank You on forum posts, for agreement with what someone says without having to post I agree.
It would also help clean up forum postings a bit.
I'm not asking for a karma mod though, which allows negativity. I don't want to see that; if there's going to be a negative post, just don't +1 it.
Also, I'm not referring to Google Plus by using +1 posts, though that may work if it has to be implemented manually (check google's API on that).