On-line Journals and Magazines

1000 Words Photography
American Suburb X
Autograph ABP
Blue Eyes Magazine
Burn Magazine
Center for Documentary Studies
Daylight Magazine
Digital Journalist
DuckRabbit
Fifty Crows
Getty Global Assignment
Great Photojournalism
In-Public
JGS
Lens Culture
Magnum Photos
Museo Magazine
Photo District News
Photography Channel
Photography Now
Seconds 2 Real
Social Documentary
Street Photography Forum
Trans-Asia Photography Review
Verve Photo

Some helpful sources for the history of photography

Camerapedia
Dating old photographs
Eastman House Notes on Photographs
Stereoview information
World Press Photo Archives

Photographers

Miki Alcalde
Andrea Bruce
Edward Burtynsky
Livia Corona
Binh Danh
Jason Francisco
Greg Girard
Lourdes Grobet
Eirik Johnson
Ed Kashi
Julia Komissaroff
Pok Chi Lau
Ken Light
Steve McCurry
Erica McDonald
Susan Meiselas
Daido Moriyama
James Nachtwey
Eugene Richards
Fazal Sheikh
Ben Speck
Brent Stirton
Jonathan Torgovnik
Wang Qingsong
Alex Webb and Rebecca Norris Webb
Paul Weinberg