NPR has a two part series about online education. The only thing that might be lost in the commentary is the motives behind the pursuit of online learning among schools that have begun offering it.
http://www.npr.org/templates/story/story.php?storyId=16638700
http://www.npr.org/templates/story/story.php?storyId=16709807
An interesting supplement to these recordings might include an interview with Robert Mendenhall at this year's EDUCAUSE Annual Event.