Aperture 
Still the best within photography for me, prove that I am wrong!

B&W. Photo Mailing list 
It is the US photo.net, highly recommended for everyone with a link to photography in some form.

Corbis.Com
Ansel Adams among others, take a look !

Digitaltruth
If you need something, have a look here, an amazing collection of bits and pieces.

Nikon UK

Nikon Corporation

Philip Greenspun.com
A central personality within internet and photography.

Photo.net
A central institution within internet photography! - just join in!

PhotoLinks 
I do not quite understand this one,(its too big I think,) but please try, you could find something here.
 

Please suggest one, for your fellow photographers! I can not guarantee the quality of the links!