As of earlier today, the number of kills on Halo 3 has exceeded the population of the planet:
Enemies KIA (HALO 3) 6,742,749,841
Estimated World Population 6,705,439,270
http://www.census.gov/main/www/popclock.html
http://www.bungie.net/online/default.aspx
I thought this was interesting. Perhaps we've got the wrong balance between sex and video-games?