File this under really good ideas. has found a use for 404 pages – you know, the ones that get served up when you mistype a url:

Thousands of children go missing every year across Europe. Thanks to the NotFound project, you can make a difference. Install our application and a picture of a missing child automatically gets published on every ‘page not found’ of your website. Together, we can find them.

There’s even a WordPress plugin for the lazy, so I’ve installed it and would encourage any else to do the same.