I got a message from Sara Nicholson at PDGA headquarters. Someone here in town (I have a name and contact number) called PDGA headquarters and said they had found a set of keys somewhere near UMKC. Apparently they are a rather extensive set of keys (lots of keys), and they have PDGA key chain tags (the kind you get in your membership packages) from 2008-2010 on the key ring. If anyone lost a set like this, give me a call, and we'll see if we can't get you and your keys reacquainted. This guy went to a lot of trouble and research to try and get these keys back to the proper owner, so hopefully his hard work will pay off.
UPDATE: The keys have a Petsmart customer tag and a Dick's Sporting Goods tag on them. The car keys are General Motors keys. There may be a beeper or home alarm or car alarm remote on the key chain. There is also is a large number of keys...home keys and apparently work keys. Someone is not loving life right now without these keys.