Over on the Asimov's forum, Gardner Dozois has posted the table of contents for his Year's Best Science Fiction 27. Here are the stories:

UTRIUSQUE COSMI, Robert Charles Wilson--New Space Opera 2.
A STORY, WITH BEANS, Steven Gould--Analog.
UNDER THE SHOUTING SKY, Karl Bunker--Cosmos.
EVENTS PRECEDING THE HELVETICAN REVOLUTION, John Kessel--New Space Opera 2.
USELESS THINGS, Maureen F. McHugh--Eclipse Three.
BLACK SWAN, Bruce Sterling--Interzone.
CRIMES AND GLORY, Paul McAuley--Subterranean
SEVENTH FALL, Alexander Irvine--Subterranean
BUTTERFLY BOMB, Dominic Green--Interzone.
INFINITES, Vandana Singh--The Woman Who Thought She Was a Planet.
THINGS UNDONE, John Barnes--Jim Baen's Universe.
ON THE HUMAN PLAN, Jay Lake--Lone Star Stories.
THE ISLAND, Peter Watts--New Space Opera 2.
THE INTEGRITY OF THE CHAIN, Lavie Tidhar--Fantasy.
LION WALK, Mary Rosenblum--Asimov's.
ESCAPE TO OTHER WORLDS WITH SCIENCE FICTION, Jo Walton--Tor.com.
THREE LEAVES OF ALOE, Rand B. Lee--F&SF.
MONGOOSE, Elizabeth Bear & Sarah Monette--Lovecraft Unbound.
PARADISO LOST, Albert E.Cowdrey--F&SF.
IT TAKES TWO, Nicola Griffith--Eclipse Three.
BLOCKED, Geoff Ryman--F&SF.
SOLACE, James Van Pelt--Analog.
ACT ONE, Nancy Kress--Asimov's
TWILIGHT OF THE GODS, John C. Wright--Federations.
BLOOD DAUBER, Ted Kosmatka & Michael Poore--Asimov's.
THIS WIND BLOWING, AND THIS TIDE, Damien Broderick--Asimov's.
HAIR, Adam Roberts--When It Changed.
BEFORE MY LAST BREATH, Robert Reed--Asimov's.
ONE OF OUR BASTARDS IS MISSING, Paul Cornell--Solaris Book of New Science Fiction, Three.
EDISON’S FRANKENSTEIN, Chris Roberson--Postscripts 20/21.
EROSION, Ian Creasey--Asimov's
VISHNU AT THE CAT CIRCUS, Ian McDonald--Cyberabad Days.

Looks like a good list of stories, and once again original anthologies are well represented. My only disappointment is that only two Interzone stories made the list. There were several great Interzone stories I'd have included, such as "Sinner, Baker, Fabulist, Priest; Red Mask, Black Mask, Gentleman, Beast" by Eugie Foster. But it's Gardner's book and his choices, and I look forward to reading the stories I've missed.