I recently booked one of these LH specials. You have to fly LH to Europe from a "gateway city. These are in Asia or in the US. You can fly an LH partner to the gateway. In fact I am doing SYD-LAX-FRA-ABZ-FRA-ORD and LAX-SYD all for A$5600 in D class. Economy fares for these are around A$2000 in W. Downside is that you have to fly LH transatlantic.

Loads of details here.

http://www.flyertalk.com/forum/showthread.php?t=417877

These are an unbelivebly good deal as the fares are significantly cheaper than the UA fares from SYD-USA