DP Review
One of the best sites (if not THE best), for camera reviews and discussion forums covering all of the major cameras and lenses.

Shorpy Historic Photo Archive
If you are interested in photos taken from about 1859 - 1970 then this is the site for you. Most of the photos are high resolution black and white photos taken primarily with either 8 x 10 or 4 x 5 cameras and sourced from the library of Congress archives. The quality is amazing and the historic insights are fascinating. This is one of my favourite sites that I check every day without fail.

The Luminous Landscape
This has been a long time favourite site. It's a good reference site, with essays and information about all things photographic. Some of the reviews are about medium and large format cameras, or cameras that are beyond the reach of most photographers, but they are interesting. Michael Reichman, the owner and primary contributor to the site based in Toronto, Ontario, is a teacher, photographer, reviewer and lecturer. Another good site to add to your daily checks when crusing the web.

The Online Photographer
A website established by Mike Johnston, a former photographic magazine editor and long time photographer. The site contains camera and lens reviews, Mike's take on the world as it applies to photography, insight, rants and a good dose of humour. This is another site that I visit without fail daily. Definitely worthwhile visiting.