The following companies have registered for Digital Book 2008

Digital Book 2008 is now sold out and registration is closed. 

a1Books
AAP
Adobe Systems Inc
AFB Talking Books
Alcatel-Lucent
Amazon
American Booksellers Association
American Chemical Society
American Institute of Physics
American Library Association
Anderson Merchandisers
Apex Content Solutions
Apollo Mobile
Aptara Inc.
Aspen Publishers
Association of Canadian Publishers
Astak
August House
Ball State University
Barnes & Noble
Barnes & Noble.com
BCR
Benetech
Blackwell
BookBank.com
Book Industry Study Group
BookMobile
BookNet Canada
Books24X7
Books On Board, Inc.
Bowker
Cambridge University Press
Cengage Learning
CERLAC/UNESCO
Chegg.com
codeMantra
Content Kinetics
Corning Inc.
CourseSmart LLC
CQ Press
DAISY Consortium
Data Conversion Laboratory
Demos Medical Publishing
DigiLife Media LLC
Digital Divide Data
Digital Media Alternatives
Disney
Disney Book Group
Disney Publishing Worldwide
DNAML
Dorchester Publishing Worldwide
eBook Technologies Inc.
ED MAP
Elittera AS
Elsevier S&T Books
E-Reads
F.A. Davis Company
F+W Publications
Facts on File Inc.
Faculty of Engineering of University of Porto
Fine Creative Media Inc.
Flextronics
Follett
Follett Corporation
Follett Digital Resources
Foreword Magazine
German Book Office
Gibson Publishing Connections
Gilbane Group
Glatfelter
Google
Greenwood Publishing Group Inc.
Grove/Atlantic Inc.
Hachette Book Group USA
Harlequin Enterprises Ltd.
HarperCollins Publishers
Harvard Business School
Harvard University Press
Hearst Media
HKM Publisher Services LLC
Houghton Mifflin Harcourt
Humanware
Hunter Publishing
Hyperion, Miramax Voice
IBR News
IDPF
ILL Publishing New York
Impress Holdings Inc.
Info Trends
Ingram Digital Group
Ingram Digital Ventures
Innodata Isogen
Innovations Plus L.L.C.
iRex Technologies Inc.
Ivins eContent Solutions
Jack Farrell & Associates
John Wiley & Sons Inc.
John Hopkins University Press
JSTOR
Kaplan Inc.
Karma Unlimited Inc.
Kensai International Ltd.
Kinokuniya
Klopotek North America
Lab126 An Amazon Company
Learning Worlds
Library Journal
LibreDigital
Librisite de Mexico
Ligaran
Lightning Source
LiveInk
Livres Hebdo
LJK Literary Management
Lobster Press
Logos Journal
London Bookseller
Macmillan Publishers
Macmillan (Holtzbrink)
Mark Logic Corp.
MBS Direct LLC
McGraw-Hill
McGraw-Hill Companies
McGraw-Hill Digital
McGraw-Hill Education
Microsoft
MobileReads
Mobipocket.com
mpowr.us
Music Sales Group
National Academies Press
National Geographic Books
NDS
NetLibrary
NetRead Software & Services LLC
Newgen
Nielsen Entertainment
NYU Press
OCLC
Olivet University
One More Story Inc.
Open Book Systems
O'Reilly Media Inc.
OverDrive, Inc.
Oxford University Press
Papyless Co Ltd
Parse Publishing
Pearson (UK)
Pearson Education
Penguin Group (UK)
Penguin Group (USA)
Pinion
Present Memory LLC
Prime View International Co. Ltd.
Princeton University Press
Publishers Weekly
Publishing Dimensions/ Jouve
Publishing Trends
R.R. Bowker
Random House Inc.
Recording for the Blind and Dyslexic
Red Wheel Weiser
Reed Publishing Group
RFB&D
Rosetta Solutions Inc.
RoyaltyShare Inc.
R.R. Bowker
Samhain Publishing
Santillana en Red
SAS Institute Inc.
Scholastic
School Library Journal
School of the Art Institute of Chicago
Short Hills Media
Simon & Schuster
Sony
Sony Electronics
Springer
St. Martin's Press
Sterling Publishing
Stonehouse Press
Superpedido Commercial S/A
Team Research Inc.
Teleread Blog
TexTech Inc.
Thames & Hudson Inc.
The Idea Logical Company Inc.
The McGraw-Hill Companies
The National Academies
The New York Times
The Precision Media Group
Thomas Publishing Co.
Tuscia University
University of Montreal
US Department of Commerce
VitalSource Technologies Inc
VitalSource
VPG Integrated Media
Walker Reading Tech (Live Ink)
WH Sadlier Inc
W.W. Norton
Wolters Kluwer Law & Business
Workman Publishing
WOWIO LLC
YBP Library Services
Zenothink
 

Due to overwhelming demand, Digital Book 2008 is now sold out and registration is closed.  There are limited exhibit/sponsorship opportunities still available however.