Blogdex
Blogdex is an online resource for understanding hot topics of discussion in the blogosphere.
The site offers a time-weighted list of links to online content cited by more than one monitored blog in the recent past. Each link receives a score based both on the number of different blogs citing it and recency of those citings; the list thus typically features both popular oddities of the day as well as informative and/or controversial source material for current topics of public debate.
Jimmy Wales offered (as the previous owner of) the domains blogdex.com, blogdex.net and blogdex.org to MIT free of charge, as he no longer had use of them. Blogdex then migrated from the original blogdex.media.mit.edu location to blogdex.net.
Blogdex was created to facilitate the academic research of site creator Cameron Marlow as a Ph.D. student at MIT.