The Washington Post has a bracket up allowing readers to help pick a most influential person of the decade. George Bush, I think stands a pretty decent chance to win this thing. On the other hand, it may just turn out to be a popularity contest, in which case he has no shot.
For my money, I think the technology guys, Steve Jobs, the Google guys, and Mr. Facebook have to at least be in the discussion. Hu Jintao probably has to be considered pretty highly as well, though he realistically has no shot in an American poll starting out against Obama.
I must say, as contrived gimmicks go, this is one I'm willing to follow.