The posting delay sounds like a terrible idea. Say I spend some time writing a very long comment to a not so popular thread and hit submit. Then I notice that someone replied to another comment of mine and had a question or something. I can't reply to him in a timely matter since I used my one comment already. So do I need to go and delete my newest comment, reply to the person who responded to me, then go back and re-comment the one I initially did? This sounds very silly.