Dan Rowinski beschreibt auf Readwriteweb die Entwicklung von Digg.com:
Digg was started in late 2004 as a news aggregator that let users vote stories up or down. The “up vote” mechanism is now commonplace on the Web, with popular sites such as Reddit and Hacker News using it as a primary feature. The up vote can be seen in many different social sites these days, with the “Like” from Facebook and “+1” of Google+ as derivatives of the concept.
Interessanter Artikel, auch wenn ich die dortige Definition des mobilen Webs als “Web 3.0” nicht teile.