I suggest that a mod is made for a full-on banking system with accounts, deposits, interest, loans, etc. It would be great for RPGs and the like. You could even make it that people can rob the bank and take people's money. I haven't really developed this idea, but I think it would be interesting. Especially for games where you have to have the money to build; you could take loans to build a house and whatnot.

When I port over my money scripts, I'll give this a shot too.

Alex made a money transfer addon for ToB, so it might help. But the download is probadly gone.