May I offer you a warm welcome to the CameraLabs forums.
No problem saying "hello" in this forum as far as I'm concerned. The best guidance I can offer is that if you were looking for a post by another member similar to one you are about to compose then try and figure out in which forum you would be most likely to find it.
Congratulations on the D200. A number of forum members have recently bought one and we look forward to your own comments and questions (probably in the Nikon forum) as well as, if you would like to share, some examples of your work in the various Photography tips