Here are two videos from Flink Labs, the same people who designed a phone app that shows you a map of where buses are which proved so popular that it crashed the server (see the end of this post). One is of Sydney Buses (i.e. no private bus routes, so it is almost exclusively the inner city and Northern Beach routes, plus the Parramatta to Liverpool T-Way) and the other of Melbourne’s trains.
Each uses GPS data and lights up the map each time a bus or train travels through a certain area. I love these sorts of maps, they make it so easy to instantly see how a system currently operates.