It's sure that Google is putting much efforts on geographic influence in ad targeting algorithm to attract advertisers and enhance geo-targeting feature of adword but what surprise me, they're experimenting to provide users a "Digg Style Voting On Search Results system" that's seems crazy idea!
if implemented it will change the way we search today. Is that's the Future Of Search? techcrunch.com/2008/07/16/is-this-the-future-of-search/
More insight on this; blog.zetainteractive.com/?p=35