Cool navigation (did you do it from scratch?)
I would do something with the main banner. It looks very anonymous to me now. Also, with the small font you´re using, I would remove the underline under the links, maybe change the color to green you´re using to make them stand out. I would remove the poll (which I find annoying and useless 99% of the time) and shoutbox (idem). It´s a lot of navigation on the left, so be sure to include some avatars, logos or whatever or your eyes might start to dance...
Overall, clean and nice