I have gotten a forgotten item back from ATL lost and found and no they won't let you look for it. For very good reason I am guessing, I think some folks when faced with all the forgotten goodies, would remember that they lost those BOSE headphones.
I received a phone call from Delta saying "we have an item that may be yours" giving me the responsibility of describing the item before they retrieved it for me. I was very grateful to get back my glasses that I left behind on the aircraft.