The Millions has done a bang-up job on previewing the major lit releases from your favorite authors. Not really much from the indie side of things, but we all know indie publishers aren't that organized (or at least that's an excuse that will give someone comfort for overlooking their stuff).
Anyway, if you're looking for when Jose Saramago, Stephen King, Michael Lewis, Murakami and that Game of Thrones guy will bust out a new one, check The Millions Great Second Half of 2011 Book Preview.
If you're looking for previews on new ones from Donald Ray Pollock (yes!), Blake Butler (yes!) Chad Harbach (obligatory mention, b/c Harbach founded n + 1 and n + 1 means 'hipster' to mainstream lit people and some lit people probably interpret 'impose' and 'codex' to endorse 'hipster,' so we'll just give'em what they're looking for; again an excuse that will give someone comfort), John Warner (see previous parentheses & substitute 'n + 1' with 'McSweeney's'), Helen DeWitt (seems interesting), Lydia Millet, Colson Whitehead, and the latest on Marisha Pessl, check The Millions Great Second Half of 2011 Book Preview.
For people like Joan Didion and Philip Roth, check The Millions Great Second Half of 2011 Book Preview.
For people like Tom Perotta that I can't ever seem to get into, check The Millions Great Second Half of 2011 Book Preview.
For other stuff not mentioned here, check The Millions Great Second Half of 2011 Book Preview.