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Both Facebook and Twitter have closed accounts corresponding to Anonymous, a formerly 4chan-linked group organizing a string of DDoS attacks on organizations that refuse to work with WikiLeaks.

The social site denies altering the trending topics section.

Russian President Dmitry Medvedev published in his twitter page his recent experience of the Samsung Galaxy Tab after purchasing one.

Evan Williams, Twitter's co-founder, says he understands Facebook's reluctance to let Twitter users look up friends on Facebook or send Facebook posts to Twitter. But the two companies are still talking.

Evan Williams may embody a classic Silicon Valley type: the entrepreneur with good ideas for a start-up, but not the leader to execute a sophisticated business strategy.

Despite a few outages in the past few months, Facebook continues to zip along as the fastest social network in terms of average response time for the site, according to a report by web analytics company AlertSite.

What was meant to be an announcement from the Whitman campaign heralding the candidate's endorsement by the San Diego Deputy Sheriff's Association inadvertently became an endorsement of a much different nature due to a URL error.

JustSpotted plans to sift through people’s tweets to identify those that claim celebrity spottings, and then to place those celebrities’ whereabouts on a map in real time. It would be similar to the now-defunct GawkerStalker, but it would be faster. (It’s not a novel idea. Last year, start-up OMGICU proposed to do the same thing, supported by text messaging and tweets, except its service requires active user participation rather than data-mining the whole Twitter community like JustSpotted will do.)

Facebook is down and has been experiencing outages since about midnight Eastern Time tonight, Oct. 5, 2010.Many Twitter users are reporting the outage, with hundreds of tweets appearing about it in minutes. DownRightNow.com confirms the downtime, with the first widespread problems starting about 11:52 p.m. EST.

Sometime in the past few hours, Twitter made a subtle, but not insignificant change: their Promoted Trends are now appearing at the top of the Trends area on Twitter.com.