Spraypainted bikes

These bikes have appeared all over Toronto. They are beater bikes, spray-painted in single neon colors, locked to signposts and bike posts and fences across town. There is no additional information except the tiny letters "GOOD BIKES" painted on the frame.
Is this some kind of guerrilla advertising campaign? If so, what is it for? It is so guerrilla that I can't even tell what I am supposed to go buy.

[Update: A. pointed me to The Good Bike, wherein an OCAD student -- behind this project to brighten the city -- blogs about the beginnings of the project.]


This post's theme word is scumble, "to modify a painting/color by applying a thin coat of opaque paint to give it a softer or duller appearance." That bicycle could do with a bit of a scumble, don't you think, old chap?