Your present layout looks indeed quite not worked through.
It is quite a challenge to create good dark background website.
Might help if you look for some inspiration around the net: just google "dark background websites".
Here is one of the examples.
As you can see from the examples, texture, patterns, gradients are applied to almost each selector. Starting with the body selector: you can use some pattern, texture of gradient to define content box more clearly: especially  if you deal with dark backgrounds ( instead of using thick white border).
Of course it will be up to you to not to get overboard with effects and keep the content readable.

http://validator.w3.org/check?verbose=1 … ral.com%2F

James