If social games are addictive now, how addictive would they be when that icon of your favorite game is always staring you in the face?

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It's a little buried at the moment -- hidden behind the "i" icon in the chat window -- but everyone's favorite social network is now offering a way to place free voice calls to friends.

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By tapping a heart icon on a photo, I added it to a timeline of favorite photos.

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His favorite so far, he said, is the Black Madonna, a revered icon housed in a monastery in Czestochowa, Poland.

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