http://freakonomics.blogs.nytimes.com/2008/05/02/freakonomics-in-the-times-magazine-hoop-data-dreams/#comments (http://freakonomics.blogs.nytimes.com/2008/05/02/freakonomics-in-the-times-magazine-hoop-data-dreams/#comments)
Here's a piece from the NY Times Sunday magazine on the Celtics use of stats. The most interesting nugget I got from it was this:
"Turnovers are way more expensive than people think," Zarren says. That's because most teams focus on the points a defense scores from the turnover but don't correctly value the offense's opportunity cost — that is, the points it might have scored had the turnover not occurred."