Whatever you think of the subway mitzvah idea, you gotta love the latex face. I plotzed laughing.

And yes, Joey, I believe you're right about the letter of the law re lost money.  It's from Bava Metzia I think.  It also says there that any object which was found in a busy street and has no identification may be kept, the assumption being that whoever lost it in such a high-traffic spot would give up hope of finding it.