We've all lost luggage, so I think Is This Your Luggage is brilliant. Here are the details from the site:
I collect lost luggage, photograph it, and then try to find the owners. It's a little odd but not as odd as stamp collecting, just a little harder to find storage space. When a bag gets lost the airport or airline will store it for a while and try to find the owner. If they can't identify the owner of the case they send it to be auctioned off with the profit going to charity. I go to these auctions and buy the cases so I can photograph them for my weird voyeuristic passion. The reason for the website? I would really like to try to find the people who own my suitcases, so if you have any friends who have lost a case please get them to have a look.
How hysterical and bizarre is that?! How do you think someone would even get started with this collecting hobby? See more here.
*found via swiss miss