Firstly absolutely gorgeous site!
But you should get rid of the splash page. The rest of the site is excellent, but the splash page is a great way to have a high bounce rate.
Plus, it's Flash. And you've got no metadata, so search engines see almost nothing when they go to your home page.
Check it out here:
http://www.webconfs.com/search-engin...-simulator.php
If you absolutely must have your Flash splash page, then you can't neglect the metadata for that page, otherwise you get an organic search result like this:
Zero description, so users have absolutely no idea what you do.... and no reason to click on you when surrounded by much more relevant links.
Next, you say that LiveIn ranks pretty well, but I'm curious for what search terms?
I'm only scratching the surface, but as far as I can see you're ranking highly for the keyword 'Erik Tyler', but I haven't found any other terms that you're doing really well on.
The reason for that seems to be this URL:
http://livein.net.au/property-sales/...us/erik-tyler/
Which on the face of it, isn't a problem, except that the page is a bio for Adrian Southern.
You've got an AdWords campaign going, but my (admittedly minimal search) turned up just two paid ads for two keywords ('canberra rental' + 'rental canberra').
The trouble with those keywords is you're not only in competition with other property groups, but with any rental group at all - my research showed that of the top ten competitors for those keywords, four of them are car companies.
It looks like those two keywords cost you around $2.25 per click and the competition for them is large, including searches performed by users with needs irrelevant to your site.
Here's a freebie: 'houses for rent in canberra' has over 18,000 local searches per month and a CPC of just $0.09. There's more where they came from.
Now as I haven't managed to find a live version of your ad, I'm not sure if the ad just takes you to that splash page.
If it does, you might as well just throw away your ad spend - you've got two options: property sales and property management. Which of those is relevant to a searcher looking for a property to rent?
Neither.
The average punter needs it simple and clear. Rent or Buy. 'Property Management' says something else entirely.
I had to go into the listings to figure out if I could actually rent from you because your terminology is geared towards getting property owners to list with you, not having renters search your site for a place to live.
This is really important when it comes to your adwords campaigns. Google looks for relevancy: it provides what it thinks are relevant results for search queries. If you have a high bounce rate then Google assumes your site is not relevant to that particular query - your CPC rate can be adjusted upwards to favour sites that provide more relevant results.
One the other hand, if you get it right your CPC can be reduced by producing more relevant results.
The ideal scenario with adwords is to have different ads for different keyword groupings and for those ads to go to very specific landing pages relevant to the advertising.
Further, by providing more relevant results for what users have been searching for you increase your own conversion rates.
Is this something you track? Do you have conversion tracking setup for your various 'thank you' pages or on anything else you want users to take action on?
I know I got diverted away from
SEO talk, but I feel that there really isn't a lot more I can say on the matter for the moment: the splash page will kill a lot of your organic search stone dead.
Alongside the URL problems and terminology issues, there's work that could be done, but I don't think you'd easily see the benefit you're looking for - i.e. high placement in organic search for real estate queries in Canberra.
There's a lot of competition going on. Not to say you can't do it, but I think you could do it quicker and more effectively with a better AdWords campaign.
SEO experts please! 
