If you need to contact this forum, you should check
https://bitcointalk.org/contact.php and choose option which is fit with your case.
Can I join? Bitcoin Talk didn't write to me when I had the chance to acquire Bitcoin for virtually nothing, and thus they deprived me of the chance to become a billionaire. Also I have a trade name issue. My great grandfather invented a discussion forum to check on fake gold coins. You bit the coin, and if you could see the teeth marks, then it was a fake coin.
I'd like to join as well since this forum don't have feature to show 100 signature at once, and thus i lost chance to earn 100x money than i do now