This news broke a few minutes ago. Via a press Release Shaw has announced that they will be engaging in customer consultation sessions regarding usage based billing in February and March, and will not be charging any overage costs until that process is complete. There is no guarantee that this will change anything. This is really only a delay of at least one month, as after two warnings people may have begun seeing charges as early as March. However this is an encouraging sign that Shaw is at the very least listening to its customers and the outrage that moving to usage based billing has caused.
I will try to write up more on this when I can properly understand and absorb what this really means, but for now please find links to the press releases below.