Charles speaks to Evgeny Morozov, blogger for Foreign Policy magazine and Graham Cluley of security firm Sophos to find out how and why Twitter, Live Journal, Google and Facebook were targeted by denial of service attacks last week. The answer it would appear is an attempt to silence one Georgian blogger - Cyxymu, who was a critic of last year's conflict between Georgia and Russia in South Ossetia. Charles finds out about him, why Twitter was so badly affected, and why distributed denial of service attacks from botnets are less successful than they were earlier this decade.
Charles also speaks to Jen Husun Huang, Co-founder, President and Chief Executive Officer of Nvidia. He discusses why the graphics processing unit will become more important to the future of computing. Instead of being used just to process intensive visual tasks, the GPU can be used to crunch data to much better effect than a CPU with multiple cores. Hear what the benefits will be, and how the GPU differs and works.
Plus there's this week's news, including the state of surveillance in Britain, details of Facebook buying FriendFeed, and Spinvox's latest troubles. Bobbie Johnson is your presenter, and he's most grateful to you for helping push the Guardian Tech Twitter feed over the 1 million follower mark...
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