Here are the New York Times, CNN, and NBC. Here is Wikipedia for background.

The case has made several appearances on LessWrong; examples include:

• You Be the Jury: Survey on a Current Event (December 2009)
• The Amanda Knox Test: How an Hour Beats a Year in the Courtroom (December 2009)
• Amanda Knox: post mortem (October 2011)
• Amanda Knox Guilty Again (January 2014)