What I want for a bike is a bell which sounds like a trolley.
They make single use rechargeable air horns for bikes which would have a similar effect. They talk about them at bikeforums.net
A better campaign would have been along the lines of "Be safe be SEEN use lights" and "check twice save a life". With photos illustrating cyclists not being very visible without lights in some conditions and how drivers need to check twice because of blind-spots.
THIS. I would go so far as to say lights are the single most effective safety device for a cyclist, and that includes working brakes. As most of you know I am anavid biker (I have a helmet, don't wear it enough), as well as a "spirited" driver. I can not tell you how many times I have almost killed a cyclist making a turn because they are invisible until they are on top of me. Dusk and rainy conditions are the absolute worst. GET A LIGHT!