I noticed that with over a hundred posts already, I am the only one to have started a thread- its not hard, just go to the appropriate area and click start new topic!
Put in the heading and your text then hit send!
This will help existing threads from getting off track if you have something only partially related to discuss, start a new post in the same area,
you can even go back to the original one and post a link to it (although unless the forum gets really big its not needed)