Facebook’s daily active users are now more mobile than PC-based, Twitter has tweaked its multimedia presentation, and Gabrielle Giffords’ appeal at Wednesday’s gun control hearing sparks twitter... more 
Facebook’s daily active users are now more mobile than PC-based, Twitter has tweaked its multimedia presentation, and Gabrielle Giffords’ appeal at Wednesday’s gun control hearing sparks twitter conversation. less 
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Thu, Jan 31, 2013 9:40 AM EST