The Daguerreian Society
Dedicated to the history, science, and art of the daguerreotype
http://www.daguerre.org/
This editor highly recommends membership to anyone interested in the daguerreotype

Craig's Daguerreian Registry
A resource regarding pre-1860 American photographic history
http://www.daguerreotype.com/

Midley History of Photography
Well-researched articles on the history of early photography, the daguerreotype and the Diorama
http://www.webarchive.org.uk/wayback/archive/20100311230213/http://www.midley.co.uk/

America's First Look into the Camera: Daguerreotype Portraits and Views, 1839–1864
A Library of Congress online exhibition
http://memory.loc.gov/ammem/daghtml/

Daguerreotypes at Harvard
An online exhibition and resource
http://preserve.harvard.edu/daguerreotypes/

Daguerreotype Collection Inventory
An American Antiquarian Society online resource
http://www.americanantiquarian.org/Inventories/daguerreotypes.htm

The Dawn of Photography: French Daguerreotypes, 1839–1855
A Metropolitan Museum online exhibition
http://www.metmuseum.org/

Daguerreobase
An online research database of daguerreotypes open for individual and institutional users and contributors. Holdings from several European museums are included.
http://www.daguerreobase.org/

Contemporary Daguerreotypes
A community website for contemporary / modern daguerreotypes
http://www.cdags.org/

Into the Light
Essays on daguerreotypes and early photography
http://www.historybroker.com/essay.htm

The Library of Congress, Prints & Photographs Online Catalog
Over 1,000 records will be located with the search term "daguerreotype"
http://www.loc.gov/pictures/

Online Archive of California (search/images)
Historical materials from a variety of California institutions
http://oac.cdlib.org/search.image.html
Nearly 300 records will be located with the search term "daguerreotype"

Helios: Photography Online (Smithsonian American Art Museum)
http://americanart.si.edu/helios/
Of special interest regarding the daguerreotype:
    Secrets of the Dark Chamber: The Art of the American Daguerreotype
    (A number of source texts are provided but with undisclosed editing)

The Internation Museum of Photography and Film / The George Eastman House
http://www.eastmanhouse.org/
Of special interest regarding the daguerreotype:
    The Gabriel Cromer Collection: A sampler
    Daguerrotypomania
The GEH photostream on Flickr provides over eighty results with the search term "daguerreotype":
    http://www.flickr.com/photos/george_eastman_house/

The Library Company of Philadelphia
The Cased Photograph Collection
http://lcpdams.librarycompany.org:8881/R/?func=collections-result&collection_id=1329

Yahoo! Group: PhotoHistory
A discussion group for archivists, art historians and enthusiasts of early photography
http://tech.groups.yahoo.com/group/PhotoHistory/

Boston Photographers Cited in 19th Century American Photographic Journals
A bibliographic database providing over 1,800 annotated records
http://www.phsne.org/members/index.php/RonPolito/BostonPhotographers/

Daguerreotypes on Flickr
Thousands of records will be located with the search term "daguerreotype"
http://www.flickr.com/

Association Louis Daguerre: le magicien de l'image
Information regarding the last and only remaining diorama created by Daguerre
http://www.daguerre-bry.com

Photographic Historical Society of New England
An active society promoting knowledge of photographic history and its heritage
http://www.phsne.org/

The Correspondence of William Henry Fox Talbot Project
A comprehensive edition of the nearly 10,000 letters to and from Talbot (1800–1877)
http://www.foxtalbot.dmu.ac.uk/

American Museum of Photography
"A Museum Without Walls . . . for an Art Without Boundaries"
http://www.photographymuseum.com/

Luminous Lint: for Collectors and Connoisseurs of Fine Photography
For those interested in Fine Photography
http://www.luminous-lint.com/