Social Software can be loosely defined as software which supports, extends, or derives added value from, human social behaviour - message-boards, musical taste-sharing, photo-sharing, instant messaging, mailing lists, social networking.
Digg, slashdot, and del.icio.us/popular - this is a constant browsing cycle for us. So why not combine them into a unified format without all the extra chrome? We can eliminate dupes and add some extra niceities.