His email is by web form, though when you get a reply you can mail direct: See "Contact Us" link on LHS of Bangkok Tonight main page. He'll get your email from the web form, you should give him a couple of usernames, in case your first choice is taken. He's pretty quick at replying.
Meanwhile if a Bangkok Tonight thread turns up in a google search, click the 'cached' link and you'll get to read the content (googlebot bypasses registration but, because it's a cached copy, you can't follow any links to rest of forum without registering)
Cheers,