This is more about the suggestion to have the site be gay only...I'd suggest that there be a forum devoted specifically to the LGBT community, or maybe one for each part of the community! but I really feel that the movie has impacted people from all facets of life, not just gay, and that it's important for those people to be able to use this great new site to come and share what they are going through. Even though the movie is a gay love story/tragedy, and that is really one of the most important, if not the most important thing about it, it is speaking to many people who aren't gay and who still need a safe site like this to sort out 'what next' and 'who am i,' etc.
There are a lot of people out there both gay and straight who see big parts of themselves in Jack and/or Ennis. I am one of them. The fact that I am bisexual but often let myself be visible as straight is only part of how I relate to Ennis. Basically I just want this site to be a friendly site for those who need it, whoever they are.
One other little note: I saw the link on Imdb, and went for it. I noticed you only cited 11,000 individual postings to the BBM board on imdb, but it's waaaay over that--it's more like 150,000 now. Check it and see.