- 1x.com - A friend of mine turned me on to this online gallery of "juried" images and I think it's probably my single favorite source to view some incredible photography. This is THE good stuff and can teach you a lot just by looking at it.
- photo.net - This is more than just a gallery, but there are also some excellent photographers that hang out here. You can also read equipment reviews and participate in forums at photo.net.
- flickr - More than just reinstating the obvious, flickr is a great source if you're trying to find work around particular subjects. Join a group related to your favorite subject matter and see what others are doing. flickr is also my first stop if I happen to be looking for locations to shoot where I haven't been before. As with any online community, be careful of the advice you might get here because everyone is a "self-proclaimed" expert. The fact that the word "pro" appears behind their name only means they paid for a subscription. It doesn't mean they know what they're doing :).
Have a list of other photographers you'd like to share? Please leave a comment and share who you find to be inspiring.