Air Berlin is currently running an offer of instant free Silver status for four months. This could come in very handy if you are planning travel with a OneWorld carrier, such as Qantas, over the summer / school holiday period.
EDIT: Thanks to MadRooster for pointing out that Air Berlin is a Virgin Australia Partner also - so you'll receive Virgin Australia reciprocal benefits too!
As a OneWorld partner airline, Air Berlin counts Qantas, American Airlines, British Airways, Cathay Pacific and many other airlines as affiliates. Silver status with Air Berlin automatically grants OneWorld Ruby status.
When your top tier status is equivalent to OneWorld Ruby, you are entitled to the following oneworld benefits, no matter which oneworld airline or cabin class you are flying:
* Access to Business Class priority check-in
* Access to preferred or pre-reserved seating (where offered)
* Priority on waitlists and when on standby (where offered)
You can register for this offer free of charge via Air Berlin's webpage (Note that the page is in German, you can switch languages in the top right hand corner).
You will receive a topbonus Silver Card for a test period of 4 months (unsure as to whether a physical card will be posted out).
If you accumulate 8,500 status miles or 8 airberlin and NIKI flights within these 4 months, your Silver status will be extended for another 12 months.
Air Berlin status also covers Virgin Australia too. So Air Berlin silver gets you oneworld ruby / Qantas silver / Virgin Australia silver equivalent benefits.