This theme is an unique and wonderful theme and it is for WordPress 3.1+ is modern, customizable, clean, and readable with nice smooth shadow effects.
Create your own custom menu, choose between 8 different header images and custom background (image or color). atheros supports six widgetized areas (two in the sidebar, four in the footer) and featured images.
Stylesheet for print and the admin Visual Editor, special styles for posts in the “Asides” and “Gallery” categories, and has an optional one-column page template that removes the sidebar.
This theme has some significant features like black, blue, custom-background, custom-header, custom-menu, editor-style, fixed width, microformats, rtl-language-support, sticky-post, threaded-comments, translation-ready, two columns and white.
Download this theme for free here