At PW2007, I lost a really important Orc in one of the doubles rounds.
While looking for that disc, I found Ken "Tank" Franks Starfire. After the round, I saw him and went up to him. He was talking with KC about losing that disc and how upset he was. I said "oh Ken, here it is. I found it during the round." Well, he was stoked, obviously.
I then said "yeah I was looking for my Orc on that hole. I'm hoping that returning this disc to you will get me some karma."
Then KC says "oh yeah, I meant to tell you, I found it" and had it with him.
Probably my favorite lost disc story - no b/c it involved KC, just that three people involved happened to be all talking about the discs being lost and we had them all through other people.