Bus Montreal seems to be the first Canadian Google Maps mashup to have integrated the new Canadian Street View imagery.
The Montreal Public Transit Planner lets users enter a starting and finishing destination and get a public transport route for their journey. Now, as well as getting a route for your journey Bus Montreal will show the Street View of your destination station.
With the added Street View option it is now possible to have a look around your destination station. This is particularly useful if it is a location that you have never visited before.