Photography Equipment (Photo.net)
Lots of advice and recommendations about building up a 35mm SLR system (also applicable to DSLRs), buying and using old cameras, planning for trips, film recommendations, insurance issues, equipment reviews and more.
Manuals for a wide variety of digital cameras. This is perfect if you're on holidays or visiting a friend, and can't remember how to get your camera to do what you want. It looks like it's getting a bit out of date now, though.
Digital Photography Review (DPReview)
Probably the best digital equipment review site on the net. They usually post previews of new equipment before it's available, and post full reviews as soon as new cameras are available.