On Freedom of Religion and the Secular State.
Mind you, if you live in Australia and would like to avoid overseas postage ... you can always try my pals at Embiggen Books or Readings, or via the Wiley site. And it will doubtless be in many fine bookshops.
The release date (!) is now only about five or six weeks away: currently set at 18 January 2012.
*"This is a must-read: Blackford has given us a forceful and persuasive book that will have a big impact on the debate it addresses." AC Grayling, Professor of Philosophy and Master of the New College of the Humanities, London