It's every photographer's worst nightmare: losing your camera in the heat of the moment. Cameras get dropped while you're running, forgotten in a taxi or stolen from your bag by pickpockets - it's a fact of life (although you'll probably be more careful the next time).
One thing you could do to track down your missing shooter is head over to stolencamerafinder.com. You can upload a shot from the camera you're trying to find, and the site will search the web for any photos which look like they were taken by a camera with the same serial number. It's a staple among amateurs and professionals alike and comes recommended by our very own Head Publisher, Stephen Sidlo.
There's a whole variety of other ways people have suggested of getting a stolen or lost camera back. Ifoundyourcamera.net accepts submissions from people who've found memory cards or whole cameras and posts photos along with a few details that the owner might be searching for.
And all-round excellent blog Lifehacker has a slightly more tongue-in-cheek suggestion: why not have a folder on your memory cards containing pictures or other files (a .txt will probably be the most widely compatible) with details of how to get your camera back to you? You could offer a reward or even get creative, like this guy did:
Good luck if you've lost a camera, and if you haven't, it's probably a good idea to get insurance in case you do.