Google Alerts, RSS feeds of Technorati searches, and Twitter trackers like TweetBeep have created a subtle but powerful shift in the flow of information between producers/performers and their audience.

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Reading email is fun, but responding to email is work. Each new email that appears in one’s inbox carries with it conflicting feelings of excitement (breaking news!) and dread (obligation to respond).

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What does phone telemarketing, email spam, junk postal mail, and credit card fraud all have in common?

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