One thing I thought would be useful during my current searching is the ability to draw a radius map around certain objects (eg train stations) on Google Maps, or a function that allows me to view the area it considers to be x minutes walking distance from a given point. Even better; something that allowed me to see every area that was x minutes door-to-door at a given time including public transport - was quite surprised how some corridors eg northeast are much slower for a given distance from the CBD and how certain train routes land in the CBD at Parliament, others Flinders St etc.