Organizations
Alliance Graphique Internationale
ATypI 
International Society of Typographic Designers
Typecon
Type Society
Type Director's Club
Type Museum
Greek Font Society 

Schools
University of Reading, Typography & Graphic Communication

Blogs/Information
Typographer
Typophile 
The Type Studio
Type Radio 
Counterspace
Type for You 
Spiekermann 
Typeface Anatomy

Tools
Linotype 
Identifont

Letterpress
Five Roses Press 
The Bileler Press 
Briar Press
St Bride Library http://www.stbride.org/
The Fine Press Book Association 
Canadian Bookbinders and Artists Guild

Publications/Publishers
Serif Magazine
Typographica
Hyphen Press
Helvetica
Typography School

Where to Buy Fonts
Phils Fonts 7% discount for GDC members
Fontshop
Berthold Types
Canada Type
Dalton Maag
Elsner & Flake
Emigré 
The Enschedé Font Foundry
Fonthead 
Fountain
Fontsmith
FSI (FontShop International)
Fontcraft 
Font Diner
Fonthaus
FontFont  
Fontef 
FontFabrik 
Gerard Unger
Holland Fonts
Hoefler & Frere-Jones
House Industries 
Jeremy Tankard Typography
Lineto
Linotype
Lucas Fonts
Mac Rhino Fonts
MVB Fonts
Process Type Foundry
Psy/Ops Type Foundry
Typotheque
The Foundry
Terminal Design
TypeCulture
Typecuts 
Typeonine
Village 

Make a font of your handwriting
Fontifier 

Book Design
Alcuin Society
NY Times Books
Peter Mendelsund
Roberto Devicq

Books

Recommendations and comments by GDC Listserv members

Bringhurst, Robert, The Elements of Typographic Style. Hartley & Marks, 1991...a thorough discussion of both the aesthetics and the nitty gritty details of fine typography and book design. Wittily written and quite enjoyable. Essential book on typography.

Lee, Marshall, Bookmaking.
"Bookmaking," by Marshall Lee, is also a very instructive guide. Third edition, revised and brought up to date for the electronic age, is in preparation, and due for publication in 1997 by W. W. Norton.

Rice, Stanley, Book Design: Systematic Aspects.
I have also found Stanley Rice's "Book Design: Systematic Aspects" equally helpful; but it, too, is getting long in the teeth. It was published by Xerox in 1978.

Tschichold, Jan, The Form of the Book.
Hartley & Marks, 1992
A fine collection covering some of Tschichold's writings over a quarter century. Perhaps less broad and thorough than Bringhurst's book, probably because it's a collection of essays. I found it very illuminating.

Dair, Carl. Design with Type.
Toronto, Buffalo NY, University of Toronto Press, 1967, 1998

Kirshenbaum, Sandra et al - editors, Best of Fine Print on Type and Typography

Tracy, Walter, Letters of Credit.

Burns, Aaron, Typography.
New York, 1961, Reinhold
Out of Print
A classic book by a classic typographer.

Spiekermann, Erik, Rhyme & Reason: A Typographic Novel.
Berlin, 1987, H. Berthold AG
ISBN 3-9800722-5-8
Another classic by another classic.

Chappell, Warren, A Short History of the Printed Word.
New York, Alfred A Knopf, 1970.
2nd Revised & updated edition, Robert Bringhurst, contributor
Hartley & Marks, 2000
ISBN: 0881791547
A thoroughly enjoyable read on the people, places, and things that make up the history of type and publishing. Warren Chappell's book was revised and appended by noted author Robert Bringhurst and this book is the perfect complement to Bringhurst's own "Elements of Typographic Style". ... And anything else by this author.

Dowding, Geoffrey, Finer Points in the Spacing & Arrangement of Type.
(Original issue: London, Wace & Co. 1957, 1966), Pt Roberts, WA: Hartley & Marks, Pubs. 1995.
ISBN: 0-88179-119-9

Wilson, Adrian, The Design of Books.
(first issue, 1967)
San Francisco: Chronicle books, 1993.
ISBN: 0-8118-0304-X

Gill, Eric, An Essay on Typography.
Available in the United States as a paperback reprint published by David Godine
ISBN: 0-87923-950-6

McClean, Ruari, Typographers on Type : An Illustrated Anthology from William Morris to the Present Day.
The selections are too short IMO but good anyway –  can point to other stuff.

Seybold, Jonathan, Primer for Computer Typesetting.
Not sure if it's still available. It is a detailed and lucid description of the logic at work behind the electronics.

Hurlburt, Allen. Publication Design: A guide to page layout, typography, format and style.
Van Nostrand Reinhold Company, 1976 and 1971.

Hurlburt, Allen. The Grid: A modular system for the design and production of newspapers, magazines and books.
John Wiley & Sons, Inc., 1978.

Swann, Alan. How to Understand and Use Grids.
Quarto Publishing plc, 1989.

Thinking in Type: The Practical Philosophy of Typography
by Alex W. White

Stop Stealing Sheep & Find Out How Type Works
by Erick Spiekerman

Thinking with Type: A Critical Guide for Designers, Writers, Editors, & Students by Ellen Lupton

Typography, Referenced: A Comprehensive Visual Guide to the Language, History, and Practice of Typography
Jason Tselentis, Allan Haley, Richard Poulin, Tony Seddon, Gerry Leonidas, Ina Saltz, Kathryn Henderson, Tyler Alterman
Rockport Publishers, 2012
ISBN-10: 1592537022
ISBN-13: 978-1592537020

Designing Type
Karen Cheng
Yale University Press, 2006
ISBN-10: 0300111509
ISBN-13: 978-0300111507