This plugin adds a list of XHTML compliant graphic links to your posts that allow visitors to easily submit them to a number (currently supported 24) of social bookmarking sites.
Furthermore, the new version adds a page in the WordPress admin section that lets you personalize it. You can select which sites are displayed, whether the links will open in a new window or in the current page. Also, you can change the heading that appears above the links. If you have pages in your site then you can select a sub-set of them (or even all of them) where the links won’t appear. You can also specify to display the links in one or two lines.
The plugin is now using an external stylesheet which you can modify to integrate it further with your theme.