Of all the web sites that I visit on a weekly basis, Box Office Guru tends to be the most annoying and shoddily written, but I can't stop, if only because you'll occasionally get observations like this: "Last weekend, Brother Bear opened on 2 screens and had a per screen average of almost $146,000. With Bear expanding to around 3000 screens, if that per screen average holds, Bear would make approximately $438 million this weekend."