Reportedly, the QRIO was capable of voice and face recognition, making it able to remember people as well as their likes and dislikes.

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They can follow their customers' shopping habits so closely that they can learn their likes and dislikes and target them with exactly the right promotions.

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"That's the power behind a tool like Facebook Connect, " says Qualman, a platform that allows third-party sites to share the information of its users, including their likes and dislikes of various products and services.

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Jukely : Built with the avid concertgoer in mind, Jukely allows users to discover upcoming shows by artists they like, and then lets them buy tickets while learning their likes and dislikes and adding a social element.

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"We just sort of put it out there, and people tailored it to their own likes and dislikes, " says Wright.

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Consumers, too, need to become more confident about their own likes and dislikes in order to push bartenders to make better-tasting drinks.

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Network man's likes and dislikes, in turn, affect the behavior of his friends, and their friends, and their friends.

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