Patrick Nielsen Hayden and David Hartwell have edited Twenty-First Century Science Fiction , a 250,000-word anthology of short fiction by writers who came to prominence since the turn of the century. The authors include "Vandana Singh, Charles Stross, Paolo Bacigalupi, Neal Asher, Rachel Swirsky, John Scalzi, M. Rickert, Tony Ballantyne, David Levine, Genevieve Valentine, Ian Creasey, Marissa Lingen, Paul Cornell, Elizabeth Bear, David Moles, Mary Robinette Kowal, Madeleine Ashby, Tobias Buckell, Ken Liu, Oliver Morton, Karl Schroeder, Brenda Cooper, Liz Williams, Ted Kosmatka, Catherynne M. Valente, Daryl Gregory, Alaya Dawn Johnson, James Cambias, Yoon Ha Lee, Hannu Rajaniemi, Kage Baker, Peter Watts, Jo Walton, and Cory Doctorow." The book comes out on Nov 5 (pre-order now). Patrick has posted some of the preface:

That phrase "came to prominence" explains our approach. Many writers publish their first work long before they come to general attention. William Gibson exploded into the consciousness of science fiction, and then the world, with Neuromancer in 1984, but he had been publishing short fiction for years before that. Likewise, there are writers in this volume whose first stories appeared as early as the 1980s, but nobody in this book came to wide notice before 2000.

The idea of an anthology showcasing the SF voices of the new century seemed like a natural project for the two of us. Our tastes are not identical, but we can fairly well agree on good writers and good stories. And we are both students of the history of SF without holding all the same opinions about it. Neither of us is especially interested in being genre policemen, dictating what is and isn't proper SF. And yet, both of us emerge from the core SF audience of the twentieth century—the SF subculture, professional and fannish, that emerged from the earnest and urgent desire to defend and encourage quality SF in the face of a dominant culture that seemed to hold it in contempt. Decades later, many of the battles of those days have been won. Others have become irrelevant. One of the interesting things about the stories presented here is that they were written in a world in which SF, far from being marginal, is a firmly established part of the cultural landscape.