Bracketologists raise their game

"As you puzzle over the 'March Madness' basketball bracket for your office pool, you can go with pure luck - and hope you hit a 9,000,000,000,000,000,000-to-1 long shot. Or you can play it safe and just go with the higher-rated team for every game. But how scientific is that? A growing number of online tools promise to give you an analytical edge over your officemates."