The new Britannica portal allows users to add to and modify its online entries, uploading text, photos, videos, and links. The announcement was careful to differentiate Britannica's foray into Web 2.0 from "other projects of online collaboration."
http://www.dukemagazine.duke.edu/dukemag/issues/091008/brave-new1.html
http://www.dukemagazine.duke.edu/dukemag/issues/091008/brave1.html