Check out WorldMapper! Above is a map of the world based on true Land Mass, but with WorldMapper, you can adjust the size of the countries based on whatever data you are trying to convey.
This is the world map based on Total Population:
This is the world map based on Total Computer Exports:
Alisa Miller, head of Public Radio International, talks about why -- though we want to know more about the world than ever -- the US news media is actually showing less. She uses WorldMapper to communicate her point about the state of today's news in the US.