The cycling department at the City is putting some effort into educating the public on sharrows and how to use them. I recall this being a request put forward by some in the cycling community, that if we're going to have sharrows, we need to raise awareness of what they mean and how to use them.
Despite that, I believe that the mere existence of sharrows without education still influences the behaviours of drivers and cyclists. Cyclists are more likely to feel they can use more of the lane and drivers are more likely to give way to cyclists. (Not all, but many).
The ads will be appearing on various online newspapers over the next couple months.
If you can't see the Flash goodness above, here's a static graphic of it: