wikipedia founded by a libertarian!? you gotta be kidding. most articles remotely touching on politics are slanted so far to the left as to be unreadable. guess anybody can claim to be libertarian, but wikipedia itself is about as libertarian as Bill Maher (who claims to be one)
Parts of Wikipedia may be biased, but the setup is Libertarian, as is the founder:
http://www.theatlantic.com/doc/200609/wikipedia