Okay, so I decided I agreed with Vermyndax that my last custom theme had puke colors. I wanted a dark theme for the site, but dark themes can be so hard to read that I didn't want to do that to my readers, so I went with a slightly blue/gray text area and a dark background. The text area isn't white so there wouldn't be a stark contrast between it and the black border to hurt your eyes. I think it's a good compromise. I still have some tweaking work to do, but I have to say I like it!
This theme was created entirely with Gimp and PHPEclipse on my Linux laptop.
And yes, I know the right nav panel doesn't work quite right in IE6 (3.7% of my visitors use this.) Get a real browser. Upgrade to IE7 at least if you can't figure out how to install Firefox.