SEOmoz was there, their tool Open Site Explorer is great for seeing the backlinks your competitors have.
Brent Payne from the Chicago Tribune (@BrentDPayne) had a neat little trick: Put the keyword first in the headline, followed by a colon, then followed by a typical headline e.g. Gmail down: 5 things to do when Gmail is down
Many mentioned SEOQuake SEO Extension for Firefox which is a great free add-on for Mozilla Firefox, you can see the Alexa Rank, Google Backlinks, Page Rank, Yahoo Backlinks etc for any website, when you search Google it will also show you all of these metrics for the search results. Great for checking whether the keyword is worth targeting. Use SEOQuake to see how many other sites link to your site and to competitors.
Another free tool I keep hearing is SEMRush.com – find out how many times your website and competitors come up in searches and for what keywords.
Also popuri.us, for checking links and rankings of sites
Each target phrase should ideally have its own landing page, one page can only rank for so much (Mike Motherwell, WMS Consulting)
Great Free Directories for Australian Businesses. Submit your small business to these online Australian business directories (Recommended by Monte Huebsch, Aussieweb)
Chris Dymock (Cogentis) had a great quote, he said the Google Content Network Display Ads were more suited for low cost products, like “candy at the checkout in the supermarket”
Kalena Jordan (@Kalena) said if you are on Twitter for your business, the best thing you can do is shut up about promoting your business and just help people.