hi math20. I just had a look. A few things seem to be missing here. IMO you should have borders around the forums. They give a neat and complete look to the design. Also, have yo removed the last column which should have 'Last post' intentionally? or is it because there are no posts there yet. I think you should have that to make it more filled with content and give it the look of a forum. Currently, a lot of space is being wasted, which should be filled.
Dude trust me, Vibrant green with pink isnt a good color combo at all, specially for Webmasters. PS: and this thread shoud be in website review forum.