I belong to a group of SF/F/H authors gathered under the SFNovelists banner, led by Tobias Buckell of Crystal Rain fame.
The original idea was to have a list where newly published authors could share horror stories, er, make that 'talk about their experiences working with editors, agents and publishing houses'. More experienced authors joined the list (some of them very experienced, with many books in print) which made it all the more useful.
Since then SFNovelists has grown in several ways, and the latest innovation is the SFNovelists site, where you'll find a communal blog, recent news items on member authors, upcoming releases and so on. It's a great central location to access a whole lot of writers, and I recommend you take a look and perhaps even bookmark it.
EDIT: Which authors belong to SFNovelists?
Charles Coleman Finlay, Tobias S. Buckell, Jim C. Hines, Jay Lake, Sandra McDonald, Mike Brotherton, Tim Pratt, Daniel Abraham, Karin Lowachee, Joseph Nassise, Chris Dolley, Karen Miller, Scott Lynch, Steven Savile, Nalo Hopkinson, Simon Haynes, Kristine Smith, Timothy Sanders, Joshua Palmatier, Jim Hetley, Greg Frost, Chris Roberson, Ilsa J. Bick, Barth Anderson, Cherie Priest, Jeff VanderMeer, Marie Brennan, S.L. Farrell / Stephen Leigh, Naomi Kritzer, Kelly McCullough, Mindy Klasky, Lyda Morehouse, Tate Hallaway, Martha Wells, Marjorie M Liu, Brandon Sanderson, Hal Duncan, Sean Williams, David Forbes, Sam Butler, Tanya Huff, Fiona Patton, Paul Crilley, Eleneanor Arnason, Maria V. Snyder, Chris Barzak, Paul Melko, Leah Cutter, Alma Alexander, Diana Pharaoh Francis, Kate Elliott, Sarah Prineas, Kat Richardson, Jenn Reese, Michelle Sagara, John Levitt, David Louis Edelman
Simon Haynes is the author of the Hal Spacejock and Hal Junior series (Amazon / Smashwords / other formats)