Here are some sites about photography that I've discovered recently; not to be missed!

Lost America via Flickr.
A collection of photos that are breathtaking and haunting; shot at night using natural and artificial light sources.

Strobist
Learn how to take great shots with less gear and a little know how.

Strobist Flickr Group
See shots from people like you and read how they did it; learn flash positions and settings.

Photocritic
A do it yourself photography blog.