Add This! Social Bookmark and Feed Button
http://www.addthis.com/

The AddThis Buttons simplifie the process of collecting and distributing content online. The Add This patent-pending Generic Content Collection System technology provides a unified method for interfacing with content collection services and aggregators. The Add This Button can be used in two ways: on websites and blogs or in the browser. Benefits of AddThis Button include: a) Easy Bookmarking – Makes it very easy for your visitors to bookmark your website or blog, and subscribe to your feeds (support most bookmarking and feed reader services); b) Social Traffic – Helps your visitors promote your website or blog to the social bookmarking services, which will bring back more traffïc to your website or blog; c) Less Clutter – Saves real-estate and reduces confusion on your website. You just put one button; they worry about all the other buttons for you; d) Statistics – Provides valuable statistics showing what content your visitors bookmark the most on your website or blog, over various time periods; and e) Free – All this is completely free, and will remain free. This has been added to Bots Blogs and News Aggregators presentation resources page. This has been added to Social Informatics Subject Tracer™ Information Blog.