Other aggregators that inspired us

some of the sites that inspired us and influenced our thinking while building polymeme:

http://www.buzzfeed.com
http://www.techmeme.com
http://www.memeorandum.com
http://www.realclearpolitics.com (and their BuzzTracker http://www.foxnews.com/politics/buzztracker/index.html)
http://www.buzztracker.com
http://www.popurls.com
http://www.buzz.yahoo.com

and probably hundreds of others!