iPhone battery life 50% of Apple's estimate?

We're still running the iPhone through all the tests possible (and you thought the weekend was for sleep, pshaw) and have some pretty big results thus far: looks like the iPhone didn't get all the battery life Apple had estimated.  We'd been hearing people having battery life problems in an informal dialog, but now some of our test results show the iPhone gets almost half of Apple's eight hours of promised talk time per charge.  We're still working to verify the results and finish some of our other crazy tests, but we'll keep you tested as we keep going.  We've got more than one phone, so after we run our initial tests, we'll run them again and again with different phones.