fsjk85 at the Australian Whirlpool forums was playing around with his camcorder's NightShot function when he found something interesting -- a hidden data matrix code on the left side of the iPhone 3G. We're guessing that's where Apple imprints the serial and IMEI numbers of each handset since it can't exactly hide them under a removable battery (cough), but we'll leave it to the rest of you to decode this sneaky tag and solve the mystery once and for all.
We just got a much higher-res image of the code -- check it after the break. [Thanks Ben]
[Thanks to everyone who sent this in]