I spent time working in Sydney Australia with a few days in Adelaide and Melbourne.
Bring your own ketchup ( they have something that resembles crushed tomato like vegetable, but it isnt ketchup)
Food is ok, good seafood, horrible pizza
Crown Dry was my beer of choice
People do not tip at the bars (I almost got my ass kicked for suggesting to several parties that the bartender should be tipped)
The people are extremely nice, helpful.
Friday nights at the pubs were great, people who you don't know willing to chat and just hang out while watching rugby
This is spring right now, summer is around the corner
Bondi beach is worth the trip, Manley beach is as well
Many of the beaches are topless, don't be a freak and try capturing the scene with your camera