Shopping Apps That Can Point You to Lower Prices - New York Times http://news.google.com/news/url?sa=t&fd=R&usg=AFQjCNEZpKpL40XVKO2UgrD9ZSSMz8wM6g&url=http://www.nytimes.com/2010/11/25/technology/personaltech/25smart.html?src%3Dbusln