Listening to [music on] the radio the other day (Two for Tuesday!), a thought struck me: the way radio was supposed to work, in the pre-payola days, the most popular tunes as requested by listeners got played the most and received the most airtime. Sort of an early version of user-generated content meets social network.

Today, blogs link to the most popular articles and content on the Web. They create a "Top 40" of whatever type of content (the songs) you are looking for.

Is radio sounding like the world's first social network to you?

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