Digital Photography School - Blog devoted to digital photography tips and techniques.

Photoblogs.org - Photoblogs.org is a huge resource for finding good quality photoblogs.

Photocritic - Photocritic is a great site devoted to all things photography. The author does photo critiques and writes about nearly every other aspect of photography.

Wedding Photography Blog - Damien Counsell's wedding photography blog, discusses his photographic observations and shares some of his pictures.