http://classicpress-themes.com/downloads/elevenwider-child-theme-for-twentyeleven/

Elevenwider Child Theme for Twentyeleven

The 2011 theme for WordPress is nice but it could be wider for most modern browsers. 11wider is your solution for a theme that uses the 2011 unique settings and can look great in a wider style as well as give you more room for what really counts: content. This child theme adds background for active menu items; dropdown icon for menu items with children; a smaller heading above the image header and more.