Flickr is a fantastic repository of photos. I have a pro account with them, and it’s one of the very few software services that I actually pay for.

Lockheed Martin Littoral Combat Ship Image is © Lockheed Martin

Other neighbors of mine with interesting pictures include:

• Lockheed Martin, who have great shots of ships and aircraft (including the photo above)
• The Library of Congress, which is hoping you will help a small part of their massive photo collection.

There are dozens of great groups to join, including the photogamer group for those of you who need inspiration.