I found a digital camera the other day and was able to find the owner from wedding some photos. It was an expensive camera, but what camera isn't these days! As I sorted through the photos trying to identify an owner, I had an idea: I marked’ my camera with a photo of my name and phone number that I leave in the memory cards. You can either photograph a ident card or copy a photo of an ident card to the memory card in your camera through it's connection to your PC. It’s not foolproof, a dishonest person would keep a found camera no matter how it was identified, but if a finder downloads your photos, your owners name is right there. I scratch engraved the case on my 35mm and may try that with the digital too - carefully! A friend suggested an ident tag attached to the neck strap rings.