Emily Guskin

The 10-year anniversary of the terrorist attacks on the World Trade Center and Pentagon was a prominent topic on blogs, Twitter and YouTube last week. Bloggers and Tweeters also engaged in some serious speculation about the upcoming edition of the iPhone.

News about two major tech companies generated plenty of attention on both blogs and Twitter last week. One involved an abrupt changing of the guard at Yahoo and the other was an interesting addition to the Google portfolio. On YouTube, some strange animals were the top stories.

The resignation of the admired businessman and inventor dominated Twitter for the week, far outpacing a pair of natural disasters on the East Coast. On YouTube an international basketball brawl drew significant attention while bloggers were stunned at the size of our national debt.

Last week, Google’s purchase of Motorola was big news on both Twitter and in the blogosphere. But Warren Buffet’s financial philosophy also scored high. On blogs, rumors about an upcoming iPhone model and discussion of various 2012 GOP candidates were prominent.

Twitter users continued to voice their displeasure at Rupert Murdoch last week, and a discussion of the scandal affecting his company was among the top videos on YouTube. On blogs, the No. 1 story was about the federal government’s ruling that marijuana has no accepted medical use.

Bloggers last week dug into a financial disaster surrounding a controversial war. On Twitter, science stories, including an eclipse and global warming, led the way. And the top YouTube video showed the downside of a social media misstep.

The new Apple operating system sent Twitter users buzzing last week while bloggers kept a close eye on a courtroom battle over the new health care law. And on YouTube, Sarah Palin’s retelling of Paul Revere’s ride was the lead video.