We did try it, and it never really worked. It was underused.
It was also hosted by a third party, which I was never really comfortable with anyway. (In fact, in the end, it was pulled without that person even informing me - leaving broken links on the site!)
I too am getting a bit frustrated by people who 'spam' the forums. If it is contained within one thread, then fine, as it is easy to ignore, but people who post random comments to multiple threads (sometimes very old threads too) which results in the loss of the real conversations of the moment, drive me nuts.