One of the things I like to do when I first find out about an internet kaiju discussion message board is promote it: Kaiju Kingdom Forums, with nearly one hundred registered members and over 17,000 posts(at the time of this blog post). Here's the board link: http://s3.zetaboards.com/Kaiju_Kingdom_Reborn/index/
You can also see the site by clicking on the title of this blog.