Ninja One is a free WordPress child theme for the popular theme framework Thematic. From the Ninja One Options page, you can easily add a custom logo, change the header background color, add your Google Analytics tracking code, and add your Feedburner feed name.
Theme Page: http://thewpninja.com/ninja-one-thematic-child-theme/
Theme Demo: http://thewpninja.com/demo/?themedemo=ninja-one
License: GNU General Public License, version 2 (GPL)