Pretty neat idea, but we all know the real power of promotions like these is in the hits the VIDEO will get if it ever gets viral. Hopefully it does and it reaches out to far more than the handful of lucky winners in SF.
the zipline last year was, imo, a better use of resources. people really liked it - they set these things up in the ferry building plaza at the foot of market street, tourist ground zero, to build visibility to with folks visiting sf. can't beat the zipline for that.