WorldMapper

worldmapper.org is a site devoted to demographic maps. That is, instead of maps based on physical geography, they base the size of various nations on a give factor- population, income, religion, or what have you.

The religion maps are particularly interesting. Here's the world map oriented by Christian population:

http://www.worldmapper.org/display_religion.php?selected=554

... which is almost normal-looking.

The map oriented by Islam:

http://www.worldmapper.org/display_religion.php?selected=564

...in which North and South America shrink virtually out of existence, and Africa balloons to enormous size.

Oriented by atheism:

http://www.worldmapper.org/display_religion.php?selected=582

... Which is basically Planet China.

There's a lot more stuff there, all of it interesting.