Nestoria has just launched in Australia, so could be added to your list of sites you could add your listings too. Nestoria is a vertical property search that’s been working with portals and agents in the UK and other European countries since 2007. The idea was to create a real estate site that’s about search as well as property, so agents provide the listings and Nestoria supplies the tools that will help people find the right property for them. Like Google there’s no advertising on the site, just the listings that are the results of your search.

Hopefully! It’s a tricky business!
This is a really interesting article though – it’s interesting to see what Google are doing with Places at the moment.

Cheers.