Just a work in progress on Sumea Maps which is powered by Google maps. It's missing a few of the bigger studios (couldn't find their postal address e.g THQ Studios Australia, Creative Assembly, Krome Studios, RatBag, Auran, Atari Melbourne House etc).
Planning to include a host of other locations including Educational institutions (AIE, Qantm etc), and events (AGDC, FreePlay, and others from the Sumea Calendar) and meetups (IGDA Brisbane / Melbourne etc).
Make sure you switch to Satellite to view locations in their highest magnification. It'll be much better and useful once I read up more on the Google Maps api [;)]