I now have stocks of the 4th edition of Overloading Australia: How governments and media dither and deny on population, by Mark O'Connor and William Lines.
The 3rd edition came and went rapidly, after Dick Smith generously sent copies, at his own expense, to all Australian MPs, both state and federal, and all Australian majors. The new edition has enabled William Lines and myself to update the book into the Gillard era.
To buy it, you can ask a bookshop to order it in (the publisher is Envirobook, in Sydney), or simply get it direct from me. Price is $20 and I don't charge for postage within Australia. All the details are at http://www.australianpoet.com/docs/oa_order_form.pdf