These links have been sitting in a 'post these links!' folder for a month.
Digital Forensics: 5 Ways to Spot a Fake Photo a supplement to the more detailed Scientific American article - Digital Forensics: How Experts Uncover Doctored Images
If you're photographing a car bomb scene in Iraq (which is illegal there), don't use a Leica M8.
How much does inkjet printing really cost? A report on 2 Epson printers concludes less than a buck for an 8x10.