Korean Central News Agency photo released on Jan. 18, 2009, showing North Korean leader Kim Jong Il posing with soldiers. STR/AFP/Getty Images hide caption

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This 1964 Andy Warhol lithograph entitled "Liz" is signed by the artist. It reads, "To Elizabeth with much love" in felt-tip pen. Christie's hide caption

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A screenshot of Piskorskiville. Five percent of Zynga's 200 million monthly users buy "virtual goods" to get ahead in the game or beautify their city. Courtesy of Misiek Piskorski hide caption

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