If you're a regular traveller, being a member of an airline lounge can pay off with access to Wi-Fi, power and the odd free meal. Until October 14, Qantas is waiving the $370 signup fee for new memberships.
That doesn't make the process free -- you'll still have to pay $435 for annual membership, so it's not likely to be worth it if you only make a handful of trips each year. If you're a relatively regular flyer and have contemplated membership in the past, it might be worth it. (I can't imagine not being a member of a lounge, but then again I can't imagine most people getting on planes anywhere as much as I do.)