According to the Center for Global Development's 2008 Commitment to Development index (CDI), the United States ranks worse than nearly all of Europe, Canada, Australia and New Zealand in promoting global prosperity. The only countries that perform worse than the U.S. are Switzerland, Greece, Italy, Japan and South Korea:
(Note: red - aid; blue - trade; orange - investment; purple - migration; green - environment; brown - security; yellow - technology).
It will be most interesting to track how - if at all - these figures shift in the face of America's economic slowdown.