Spell with Flickr is pretty fun. See my business name at the bottom of the blog. I love this because if you don't like a certain letter you can just click on it and you'll get a new one. Take it for a test drive: http://metaatem.net/words/ Just put whatever words you want in the "spell" box and you'll get your image. This and the other mashups would be great if you have a visual problem you're trying to solve in the library.
I think sharing photos online is great. I need to get over the old way of thinking about copyright issues and my feelings of protecting my work. As long as no one is out there making money off someone else's stuff no harm can be done, right? Right??