http://commons.wikimedia.org/wiki/File:Imageworld-artphp3.png
I think there is a huge number of notable topics that we have not yet
covered. Sure, there may be fewer sources about central Africa, but
what about China and South America? The areas most Wikipedians care
about are well covered, so we don't notice the gaps. The meme that
Wikipedia is finished and we only need to add new things that become
notable is very dangerous.
