Coverage of the conflict in Afghanistan got a big boost last week after the WikiLeaks organization unearthed classified reports casting doubts on the prospects for U.S. success there. But in a balanced news week, a key ruling in the Arizona immigration battle, the departure of an embattled BP CEO and a sluggish economy shared the media’s attention.

The controversy surrounding General McChrystal – and especially Obama’s role in the matter – commanded attention on blogs and Twitter last week. Twitter users also shared news of a landmark copyright ruling portrayed as a victory for online freedom. And on YouTube, a clip of a dancing baby led to a vibrant conversation over authenticity.

Obama’s replacement of General McChrystal as the head of NATO forces in Afghanistan generated voluminous political analysis last week. Coverage of the war approached a level not seen since late last year. Meanwhile, the Gulf oil spill continued to attract headlines, as did Wall Street reform. 

The disaster in the Gulf of Mexico became a hot topic in blogs and on Twitter last week, with the discussion focused on a range of storylines. At the same time, two subjects that had generated little attention in recent weeks—the economy and the war in Afghanistan—also drew significant interest. On YouTube, a Congressman’s angry response to being filmed drew almost 2.5 million views.