i feel it's too dark too. perhaps you should make all the text #FFFFFF else reading would be a pain. the design itself looks more like a security/hacker site to me.
hmmm not bad but put some colored text to make it more balance like put some yellow, navy blue colors ... and ow I guess the logo needs to make a revision too plain. I agree with the diagonal strips background you need to change that also make it like a horizontal gradient would be really nice.
It reminds me of a very active forum which I use frequently http://Sherdog.net It depends on your topic really. You may want to add some bells & whistles in the header area.