iPhone Batteries - Join the countdown.

I had written previously about the concerns around the iPhone batteries. This is obviously one of the hottest debated topics in the Mac circles. Taking this debate to a streatch, contributors of the PC magazine (For lack of better things to do) have made a calculator to estimate accurately (?!) when your iphone batteries are likely to die out. Here it is:
http://www.pcmagutils.com/cgi-bin/countdown.cgi