Galleries

Zone Zero, Pedro Meyer
http://zonezero.com/
This site started in the 1990s and includes hundreds of photo essays, carefully presented. It also includes essays by Pedro Meyer about contemporary trends in digital photography. The following are a couple of example photo essays.

Digital Landscapes by Dan Biferie
http://zonezero.com/exposiciones/fotografos/biferie/

Things that don't want to die by Pablo Garber
http://zonezero.com/exposiciones/fotografos/garber/

Masters of Photography
http://www.masters-of-photography.com/
This site includes examples of dozens of famouis photographers, most from the early and mid 20th century. The presentation is not very good, but it can be a good place to get a taste of the work of various famous photographers you'd like to investigate more thoroughly elsewhere.

References

Real World Digital Photography by Katrin Esimann, Sean Duggan, and Tim Grey
http://proquest.safaribooksonline.com/0321223721
This is an online version of a very through book on Photoshop. Highly recommended.

Real World Photoshop by David Blatner, Bruce Fraser
http://safari.adobepress.com/0321245784
This is an online version of a very through book on Photoshop. Highly recommended.

Digital Photography Review
http://www.dpreview.com/
An excellent site devoted to information on digital cameras. The in-depth reviews are extremely thorough. I recommend consulting this site whenever you consider purchasing a digital camera.

Canon Digital Rebel Review and Feature Description
300D: http://www.dpreview.com/reviews/canoneos300d/
350D: http://www.dpreview.com/reviews/canoneos350d/

Ron Bigelow Articles
http://www.ronbigelow.com/articles/articles.htm
This site is produced by a professional photographer who has posted dozens of thorough articles on image processing. The articles on sharpening are particularly good.