Canadian station Joe FM had the city of Edmonton talking the other day, as they brought one of their female employees out onto the streets to hand out $100 bills to punters.
She went into coffee shops, bus stops and what-not while travelling around in a limo. You can imagine that people would notice alright.
Got the station enough publicity to warrent a few mentions...nice one. A bit of world wide exposure for a thousand bucks or so? Not bad.