The proliferation of online polling and politically-themed social-media content -- from the candidates' own Web sites to the ceaseless barrage of micro-rants on Twitter -- have stamped this election with an unmistakable Web 2.0 imprimatur. Consider YouTube, Google's popular video-sharing site. YouTube staked its claim in the political arena during the primaries, when it partnered with CNN to host a debate among the candidates of the two major parties. But that was just the tip of the iceberg.

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