"The encyclosphere will be the universal network of encyclopedias—an ownerless, leaderless, centerless knowledge commons. Like the blogosphere, it will be a decentralized series of “feeds,” but feeds of encyclopedias and individual articles posted anywhere online."
Larry Sanger, the Wikipedia co-founder and helper and advisor to many other educational and reference websites is president.
That probably didn't take all that many resources to make though.
The other listed projects are search engines for various encyclopedias (stuff like Britannica, stanford philosophy, "citizendium" (which seems like a smaller chiller less persnickety wikipedia, cosy)) and seem nice enough.
Revel in the marvels of the universe. We are a collective of forward-thinking individuals who strive to better ourselves and our surroundings through constant creation. We express ourselves through music, art, games, and writing. We also put great value in play. A warm welcome to any like-minded people who feel these ideals resonate with them.