Hey 85URK, I live just behind the Kawana Shopping Centre... what colour car is yours? (so I know what to look out for). Did you go on the MSCIII?
I too originally came from Sydney (well, Penrith anyway), and would NEVER go back. I'm currently saving for my first house, which is a hard task as I keep spending money on my car!!, and the house prices vary depending on how close to water you would like to be mainly.
How busy is it? Well, road planning is pathetic, and development is slow as! Peak traffic is terrible, but once you know your way around, there are short cuts (or less busy alternatives) for us impatient drivers.
Job vacancies depend on your trade/skills obviously. Transport around the coast is buses/taxis only - trains are only to get you north or south of the coast.
Everything else has pretty much been covered - I hope that's helped B-Man!