Census Bureau Population Estimates: PopClocks http://www.census.gov/main/www/popclock.html Daily US and World Population Estimates from the US Census Bureau en-us None http://blogs.law.harvard.edu/tech/rss US Population Estimate: 312,969,692 at 02:50 UTC (EST+5) Feb 06, 2012 http://www.census.gov/population/www/popclockus.html Federal Government Statistics World Population Estimate: 6,992,521,924 at 02:50 UTC (EST+5) Feb 06, 2012 http://www.census.gov/cgi-bin/ipc/popclockw Federal Government Statistics