Yahoo! Buzz, the Digg-Like social network by Yahoo now is open for all publishers. As TechCrunch quoted: Yahoo! Buzz is different from Digg as script, because in Buzz the stories pushed to the front-page are handpicked by the Editorial team and in Digg, the algorithm takes care of everything.
Till Buzz can be integrated to all social network plug-in submitter, you can submit you post/article from http://buzz.yahoo.com/submit/ and is necessary an Yahoo! account!