Looks like the voting system is back (WOOHOO!!!)
Hopefully this will help restore the quality of comments and discussions to a degree, but that'll only happen if we don't abuse the system. If we just neg everyone we disagree with, it'll just be a pissing match in another form. So, please, only use the votes responsibly.
EDIT: It looks like the function is only available for diary comments at the moment. Hopefully it'll get rolled out to the front page and board soon. The point still stands.