I'd like to recommend that the Code Critique sub-forum be moved into the PHP Help forum instead of the current Discussion forum. I think that it both makes more sense there, plus it seems to get buried being down in the Discussion forum (and which I think of as more of the "off-topic forum").
If you think it would mean too many sub-forums in the PHP Help forum, then I'd recommend getting rid of the PHP 5 sub-forum (and moving its content into the Coding sub-forum), as it's not all that busy and PHP 5 is pretty much mainstream now.