Good portal with a number of different photography-related podcasts.

The Center for Fine Art Photography promotes the Art of Photography by supporting the growth of creative artists through exhibitions, educational programs and by educating the public to the collectable value of photography.

The Luminous Landscape is the world's largest site devoted to photography education. Its primary author is Michael Reichmann.

Non-commercial community of large format photographers, includes a repository of primers, how-to articles, user's reviews of equipment, and an active discussion forum.

This is a free site with a membership option. There is a lot of photography content including, articles, forums, reviews, and lessons. Photosig also has a gallery in which you can browse pictures in a number of formats including by camera, lens, film, etc.