I've put together a dark skin for odforce that some of you cave-dwellers may be interested in. You can grab it here.
In order to use this theme, you'll need the stylish browser plugin for firefox, or chrome. Otherwise, it's useless.
To install from firefox, you click "manage styles", and then "write new style". Copy + paste the CSS into your blank style, and give it a name.
I've updated it quite a bit, but it's not perfect. If you find any big areas that I've missed, let me know and I'll try to keep it updated, but no guarantees. It's dead simple to do youself if you use the FireBug addon.