This is the world map scaled by population (via Boingboing/Awholelotanothing). It shows why BRIC (the biggest 4 developing countries in this map, sort of, though they should include Indonesia, BIRIC) has been talk of the town these days.
Below is the similar (anamorphose) map for 1950 and 2025, as projected in 1993
Here is one scaled by wealth (GDP in PPP, 1995 data), note China and Russia grew a lot in the past 10 years
This is the same map using exchange-rate converted GDP (perhaps with slightly older data as well): Color denotes income: yellw=highest, green=lowest.
GDP/cap 1995 by PPP
GDP density (US$/km2) is a guide for real estate speculators.
Share of service in GDP shows strong correlation to GDP/cap (note India has higher service content than China, due to the IT/outsourcing industry)
Future trend: GDP/cap growth (1990-2001)
More population sized maps, population scaled flags
Simple square shape, population scaled
Shape preserving, pop-scaled
Square shaped GNP map, 2000