chance1376 - 8:50 pm on Aug 29, 2010 (gmt 0)
Don't bother with forums that you have intention on being a productive member of. As piatkow mentioned you will be banned for spamming. Even if you are on thread topic but only post on the forum only once you will likely be banned as well. The only caveat is if it happens to be a wood working forum and you truly make a quality post.
In my experience users who sign up just to drop their link into a forum thread are not quality posters. It reads like spam and only takes a few minutes to be reported as spam by members if the mods don't cache it first.