The easiest way to find a free image is probably to take it yourself, and release it under a free licence of your choice. Okay, so you might not be able to find *that thing in particular you are looking for*, but consider what you do have to take pictures of, and let others worry about the rest.
Then again, maybe you don't have a camera. Maybe banning the people who do have cameras, and use them, isn't always a good idea.
On 24/09/2007, Nick heligolandwp@googlemail.com wrote:
Just thinking about it, how long does it take to track down a photo of a celebrity on Flickr and ask the photographer for him to relicence one or two images under CC-BY or CC-BY-SA licences on Flickr ? I'd imagine, about the same amount of time it takes to upload a non free image, write a fair use rationale and add all the necessary information. There's no benefit in taking a short cut and sticking up a random photo from Google Image search when the same amount of time and effort could see a good quality free image nobody will annoy you about ever again. Ditto for sending an e-mail to a publicist or publishing house.
I've also found lots of free images on other Wikipedias, if something doesn't have an image, check the interwiki links and see if the image you want is on Commons or is free on another project. That's how we got our Pavarotti image.