Unlike in the Year's Best Fantasy and Horror, Australians don't feature nearly as prominently in The Year's Best Science Fiction. Dozois is generally supportive of small press and has said nice things about the Aussie small press scene in the past, but he's not impressed this year. Almost all the Honorable Mentions garnered by Australians have been in international publications, barring two from the Cat Sparks edited AGOG! Ripping Reads (well done Cat, who gained an Honorable Mention for her SF writing as well). Two Greg Egan stories were reprinted in the volume itself, "Glory", from the Strahan/Dozois collection The New Space Opera, and "Steve Fever" from Technology Review.
The Honorable Mentions for Australians or for works published by an Australian editor/publication are below. Apologies if I've missed any and congratulations to all.
Jenny Blackford, "Python", RUINS TERRA
Simon Brown, "Reiteration", MAN VS MACHINE
Jack Dann, "Cafe Culture", ASIMOV'S JANUARY
Stephen Dedman, "Centenary", COSMOS APRIL-MAY
Terry Dowling, "The Magikkers", WIZARDS
Terry Dowling, "The Suits at Auderlene", INFERNO
Grace Dugan, "Somewhere in Central Queensland", STRANGE HORRIZONS, 22 JANUARY.
Greg Egan, "Dark Integers", ASIMOV'S OCT NOV
Greg Egan, "Induction", FOUNDATION 100
Margo Lanagan, "Reflecting Glory", FOUNDATION 100
Margo Lanagan, "She Creatures", ECLIPSE
Chris Lawson, "Screening Test", AGOG! RIPPING READS
Geoffrey Maloney, "When the World was Flat", AGOG! RIPPING READS
Geoffrey Maloney, "Blonde on Blonde: An American Fable", ALBEDO 33
Barry N Malzberg and Jack Dann, "The Art of Memory", JIM BAEN'S UNIVERSE DECEMBER
Garth Nix, "Bad Luck, Trouble, Death, and Vampire Sex", ECLIPSE
Garth Nix, "Holly and Iron", WIZARDS
Garth Nix, "Sir Hereward and Mister Fitz go to war again", JIM BAEN'S UNIVERSE APRIL
Cat Sparks, "Hollywood Roadkill", ON SPEC SUMMER
Anna Tambour, "The Jeweller of Second-Hand Roe", SUBTERRANEAN 7
Sean Williams, "Cenotaxis", MONKEYBRAIN BOOKS
Bruce Carlson, "Dogs of War" (June-July)
Sara Genge, "Family Values" (Aug-Sep)
Mary Robinette Kowal, "For Solo Cello, p. 12" (Feb-Mar)
ECLIPSE 1: New Science Fiction and Fantasy (edited by Jonathan Strahan)
I counted nine honorable mentions other than those by the Australian contingent already mentioned, so well done to editor Jonathan for picking such a fine batch.
THE NEW SPACE OPERA (edited by Gardner Dozois and Jonathan Strahan)
Almost the entire contents is reprinted or Honorably Mentioned, so I'll not reproduce them here.
WIZARDS: Magical Tales from the Masters of Modern Fantasy (edited by Jack Dann and Gardner Dozois)
Again, almost full contents Honorably Mentioned, which is interesting, considering the blurbs for the book (and the title) all indicate it is a collection of fantasy stories...