via www.nytimes.com/

Many of the media outlets influencing the 2008 election simply were not around in 2004. YouTube did not exist, and Facebook barely reached beyond the Ivy League. There was no Huffington Post to encourage citizen reporters, so Mr. Obama’s comment about voters clinging to guns or religion may have passed unnoticed. These sites and countless others have redefined how many Americans get their political news.

on how the web 2.0 changed the 2008 presidential campaign.