What I don't understand about the TransLink (public transport) website and journey planner is that they have GPS coordinates for their bus stops, train stations and ferry jetties, but don't have links to Google Maps for them. You look for transport from here to here, and you get your options, but it won't tell you where exactly those stops are.
What I think would work well as a mobile GPS application is public transport tracking. You plan a journey on the website and it gets sent to your phone as a series of GPS coordinates in a map application. As you travel along, the stops are ticked off and you can tell when you are nearing your stop. Alternatively, you could set the application to trigger an alarm when you get to your destination so you don't have to look at the screen, or you could even sleep until your stop comes up.
Mokalus of Borg
PS - Someone somewhere has probably done this.
PPS - Or someone is working on it.