Just got an email from the Coachella festival. Starts off as a typical marketing "touching base" type email, but it includes this section:
LOST & FOUND
Once again we have successfully reunited many people with their lost items. We still have an assortment of random stuff so please email email@example.com if you are looking for an ID, Wallet or anything else and check out these links:
Keys & Misc: http://coachella.com/keysmisc.html
Each link has a photograph to numbered items from lost and found, with a note that if it's yours to email the number and something that can prove it is yours (what's inside a bag, what photos may be on a camera, etc.)
A nice little above and beyond customer service touch.
(Though I don't know how one can describe: "Hey! That's my iPod dock and charger!" in a unique way...)