Amazon's star ratings are about to get a lot more useful

Do you pay much attention to the star ratings left by previous purchasers when shopping for stuff on Amazon? The e-commerce giant has told CNET that those star ratings are being tweaked to be more useful.Newer reviews get more priority over older reviews, while ratings left by "verified Amazon purchasers" will also carry extra weight. Reviews upvoted by other users get pushed to the top too."The system will learn what reviews are most helpful to customers... and it improves over t