Australian SF book publishing has undergone a boom recently, and sometimes it's easier for new writers to sell a book to a local publisher first, which then makes a US edition more likely.
Greg EganPop science goes flying off in all kinds of fashionable directions, and it often drags a lot of SF writers with it. I've been led astray like that myself at times.
Greg EganDiaspora starts about a thousand years from now. Most of human civilisation has moved inside computers; essentially, a major branch of our descendants consists of conscious software.
Greg Egan