What?s Hot This Week in Social Media

Welcome to this week?s edition of ?What?s Hot in Social Media,? a series in which we revisit the week’s most popular stories concerning social networks.

We?re keeping our eye on five interesting developments this Thursday.

Hackers Take Down Visa, PayPal,…

INTERNATIONAL RECTIFIER INTERNATIONAL GAME TECHNOLOGY INTERNATIONAL BUSINESS MACHINES (IBM) INTERDIGITAL COMMUNICATIONS INTEL