The Long Earth's release date is 1st July in Australia.
And yet, I held a copy in my hands last night.... Random House Australia has sent us some Pratchett books (including TLE) to use as prizes at the Unseen University Convivium next month.
We are being a very well behaved committee and NOT reading The Long Earth now. After all, it would be unfair to the people who eventually win the books. But tell you what, it is bloody hard to resist the temptation....