The other shoe just dropped. Viacom, which last month demanded the the search engine remove 100,000 pirated clips of the Daily Show and other programming, has just sued Google for $1bn. People have been wondering which media behemoth would first have the balls to take on Mountain View. Here's your answer: a cranky 83-year-old media tycoon called Sumner Redstone who, like Dr. Evil in the Austin Powers movies, knows that one billlllion dollars rolls nicely off the tongue.

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