Here are some links that I visit or have visited to learn about photography and using my equipment:
http://www.photo.net/ -has forums and a gallery of pics to get ideas!
http://web.canon.jp/imaging/enjoydslr/index.html -simple online course to learn how to use your digital SLR
http://www.dpreview.com/ -a website that has forums and compares equipment ie. which lens to buy?
http://www.popphoto.com/ -the website for the popular photography magazine
http://www.ephotozine.com/ -the website to highlight your photos..has forums and galleries to check out--some of my pics are there under susanann
http://digital-photography-school.com/blog -has forums and galleries and articles about photography
http://www.digital-slr-guide.com/ -has articles, an online course (which is fairly cheap) and you can sign up for an e-newsletter delivered to your mailbox 1/month with articles and product reviews, etc.
http://www.henrys.com/ -I use this to see what's available for my camera and check prices too.
http://www.dslrtips.com/- exactly what the name says--gives you tips on using your DSLR.