After much hesitation and consideration, I took the open source community's advice - "release early, release often" - and finally put this WordPress theme up for download. Let me tell you a little about it.
To begin with, it's an early release (and my first WP theme!). Beta, alpha, call it what you want. It's working on my site and has been tested in a lot of browsers. However, there are no guarantees. Now what about the good stuff?
The vision (yeah, I have those) is that you shouldn't have to edit a single line of PHP, CSS or (X)HTML except for a config file. In other words, it's meant to be very easily customizable. It's far from there yet but it's actually fairly simple.
You can create substyles - change the color scheme - and just change CSS filepath in index.php. I've created a default style in styles/substyles/default which you can easily copy or make changes to.
Right now, the config file is very small and basically only gives you the option to change column widths. This file is something I'll be working on expanding when I have the time, and hopefully it'll later be used to specify style and widths as well as turn many features on or off.
A few momentary catches: it lacks widget support and you'll need a few plugins for it to work without modifications. Oh, and there's no documentation. But this is all on my todo list, as well as some layout- and bug fixes.
More details can be found on The Motherless Theme project page.