Thanks to [shirtygrizzly](http://www.ozbargain.com.au/user/62507) for picking this up on the WORD bookstore post. Same deal, except oddly Koorong isn't offering free shipping on any amount.
Seems Word could do with some help advertising this - surprised no-one had heard about it yet. 20% off online (with free shipping and an extra 5% off if spending over $125).