Sergey Brin gives $500,000 to help Wikipedia
I personally would love to see Wikipedia sell ads.  Nothing crazy, just one subtle and tasteful text ad per page, sold by auction.  (The ads would be much smaller and more relevant than "a personal appeal from Wikipedia founder Jimmy Wales".)The revenue could allow Wikipedia to take on ambitious projects to further its mission statement, similar to the Mozilla Foundation or NPR.Unlike most publishers, Wikipedia doesn't need to worry about maintaining a firewall between sales and editorial -- so I think it's a natural fit.