I liked the Firey Dark metacity theme by Themer but I coudln't find a GTK theme that I liked to go with it. I decided to create my own.
I used the Water Vapor GTK Theme as my starting point, and drew some of the graphics from the Firey 1.0 and Firey Dark metacity themes. Other graphics are my own creation. As the screenshot shows, they go together quite well.
Since this is my first effort at creating a GTK theme, I'll be tweaking it as problems are spotted.
The font used in the screenshot is Duality.
Firey Dark Metacity Theme: