This multiple award-winning documentary feature film is only just now being shown on PBS in the US. It will probably be some time before being shown here in Australia (if we're lucky enough to see it at all), but it looks to be an interesting study of this part of the history of church-state separation in that country.
Website: http://jayrosenstein.com/pages/lord.html
Article written for the Secular Coalition of America:
http://www.secular.org/blogs/david-niose/new-pbs-doc-atheist-mom-goes-supreme-court-and-wins