I want to compare yedda.com to Wikipedia, the online encyclopedia that's a collaborative work by its users, or the old Ask Jeeves, a search site, now ask.com, that let you pose your queries in the same way you ask questions in real life. However, it also has elements of collaborative bookmark site del.icio.us, not to mention old-fashioned Usenet newsgroups.
Article: http://us.rd.yahoo.com/dailynews/rss/searc...tory/56479.html