I saw this thread and I just had to post. Last weekend I was running some errands around town. I saw a little ways ahead something on the ground that looked like a PDA on the ground. Then the only other person in the area picked it up. I kept walking and saw that item on the ground was a wallet. I didn’t think anything more about it and went about my shopping. About 15 minutes later I was walking out of a store and saw the man who had picked up the wallet handing it to another man. The man who was receiving the wallet pulled a few dollar bills out of the wallet and offered them to the first man. The first man refused and the man with the wallet thanked the first man repeatedly. Then the 2 men walked off in different directions.
I am pretty sure that the man who picked up the wallet got a hold of the owner and returned it to its rightful owner, with the cash still in it!