I am pleased to announce my first WordPress theme called Atlantis. I created this theme for use with my own site, and got lots of requests to release it. It's a dark theme that comes with the ability to easily customize the color scheme (it comes with six and you can easily create your own) and determine which of your pages appear as "tabs" along the top just by setting custom fields in your posts. I also threw in some custom navigation functions designed to tame large page lists and a recently updated pages notifier that inserts a subtle announcement at the top of the home page.
Since this theme has a number of options, please make sure to read the README file. I know dark themes aren't everyone's cup of tea, but if you're into it then enjoy!
Screenshot and download:
P.S. No live demo right now, but I hope to get that up tomorrow. Must sleep right now.