I have played but I can't see what it does. Oh well never mind.
This is what Staff said when they released 2010 which is the theme I am using
"The 2010 theme for WordPress is stylish, customizable, simple, and readable — make it yours with a custom menu, header image, and background. Twenty Ten supports six widgetized areas (two in the sidebar, four in the footer) and featured images (thumbnails for gallery posts and custom header images for posts and pages). It includes stylesheets 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.
I love WordPress and I know it is free, but I wish there was a little more documentation sometimes :(