I just came across this wonderful collection of images a woman has put together for personal OR commercial use. Take a look. There are some great ones there!!
http://karenswhimsy.com/public-domain-images/

Examples:

Very nice... Thanks, Reka!

You're welcome, Byron. It got me looking for more:

http://www.publicdomainpictures.net/
http://www.princetonol.com/groups/iad/l ... ipart.html
http://www.pdimages.com/
http://www.sdst.org/shs/library/cfimages.html
http://en.wikipedia.org/wiki/Wikipedia: ... _resources

http://www.burningwell.org/
http://www.pdphoto.org/
http://www.public-domain-photos.com/
http://www.wpclipart.com/

http://antiqueclipart.com/
http://www.openclipart.org/
http://publicdomainclip-art.blogspot.com/
http://www.archivalart.com/lightbox/index.php