Firebug is a dark (but colorful) theme with two widget-ready sidebars, space for 125×125 banner ads, social tagging options at the end of each post, Gravatar ready comments, feed subscription options, WordPress 2.5+ Gallery feature, and much more. I have also included the logo.psd file in the images folder of the theme so that you can replace the logo.gif file with your own modified version.