i hated being bothered buy the copyright issue so i just take my cameral along me and take photos all the way so i got my own image collections
I have a problem with people who tell me to Google, why should I Google when I can get individual attention & TLC on DP?
It may have been mentioned before, but I always use Flickr's Creative Commons Licence images. So long as you link back to the photographer where possible, they're more than happy to share their work with you. I guess any artist loves an audience!
thousands of places where you can get related pictures for your site. the best place to search would be Google images.