It's been a few minutes since I made a list, so here's the full upcoming schedule:
Key: hc=hardcover, ho=hardcover omnibus, tp=trade paperback, to=trade paperback omnibus, mm=mass-market paperback, mr=mass-market reprint
September 2008
Star Trek 101 by Terry J. Erdmann & Paula M. Block (tp)
ENT: Kobayashi Maru by Michael A. Martin & Andy Mangels (mm)
Star Trek calendar
Ships of the Line calendar
October 2008
COE: Wounds by Ilsa J. Bick, Keith R.A. DeCandido, John J. Ordover, Terri Osborne, and Cory Rushton (to)
Destiny: Gods of Night by David Mack (mm)
November 2008
Destiny: Mere Mortals by David Mack (mm)
Academy: Collision Course by William Shatner, with Judith & Garfield Reeves-Stevens (mr)
December 2008
Destiny: Lost Souls by David Mack (mm)
January 2009
Mirror Universe: Shards and Shadows, ed. by Margaret Clark & Marco Palmieri (tp)
TOS: Errand of Fury: Sacrifices of War by Kevin Ryan (mm)
February 2009
A Singular Destiny by Keith R.A. DeCandido (mm)
March 2009
TOS: Mere Anarchy by Mike W. Barr, Christopher L. Bennett, Margaret Wander Bonanno, Dave Galanter, Dayton Ward & Kevin Dilmore, and Howard Weinstein (to)
Titan: Over a Torrent Sea by Christopher L. Bennett (mm)
April 2009
NF: Treason by Peter David (tp)
VOY: Full Circle by Kirsten Beyer (mm)
May 2009
TOS: Crucible by David R. George III (ho)
Vanguard: Open Secrets by Dayton Ward & Kevin Dilmore (mm)
June 2009
TOS: Troublesome Minds by Dave Galanter (mm)
July 2009
TNG: Losing the Peace by William Leisner (mm)
August 2009
Seven Deadly Sins, ed. by Marco Palmieri (tp)
DS9: The Soul Key by Olivia Woods (mm)
September 2009
DS9: The Never-Ending Sacrifice by Una McCormack (mm)
October 2009
ENT: The Romulan War by Michael A. Martin (tp)
VOY (title TBA) by Kirsten Beyer (mm)
November 2009
Myriad Universes (title and authors TBA) (tp)
Titan (title TBA) by James Swallow (mm)
December 2009
COE: Out of the Cocoon by Robert T. Jeschonek, Kevin Killiany, William Leisner, and Phaedra M. Weldon (to)
Vanguard (title TBA) by David Mack (mm)
2010
The following titles don't have publication months yet, but are intended for 2010:
TOS: The Unspoken Truth by Margaret Wander Bonanno (mm)
TOS: The Millennium Bloom by Mike W. Barr (mm)