I have always loved hanging out on webmaster forums and blogging forums, but there aren't many sports bloggers here, so I decided to make a webmaster forum for sports bloggers. Here's the link: http://juicedsportsblog.com/forums Tell me what you think.
I like the Talk Smack/Blog Feuds section. Funny. I don't know how many sports bloggers there are out there, so I'm not sure what kind of traffic you'll receive. However, you could probably get some sport enthusiasts to the site, and bump your Sports Discussions category to the top of the page. Once you get enough traffic, add more subcategories (team threads, etc.)