Try not to take pics on an iphone. I can tell all this about it:
Orientation of image: 6
File change date and time: 2010:10:11 19:02:51
Image input equipment manufacturer: Apple
Image input equipment model: iPhone 3GS
Software used: 4.0.1
Exposure time: 0.1
F number: 2.8
Exposure program: 2
ISO speed rating: 640
Shutter speed: 3.3243
Aperture: 2.97085
Metering mode: 1
Flash: 32
Lens focal length: 3.85
Subject area: 1023, 767, 614, 614
Sensing method: 2
Exposure mode: 0
White balance: 0
Scene capture type: 0
Sharpness: 0
And there are ways to get your location.