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.
Originally located at blogdex.media.mit.edu, the creator of the site, Cameron Marlow, requested and received the blogdex.net domain name from Wikipedia, which owned it at the time.
Blogdex was created to facilitate Cameron's research as a Ph.D. student at MIT.