Thanks to this awesome post (found via Flowing Data) I have discovered a process known as databending. Basically you import an image file into Audacity, then modify the file as though it was an audio file.
Below are the results of databending a few photos this weekend. The echo, amplify and phaser effects seem to give the most interesting and immediate results, but there are countless others to experiment with.
If you are interested in databending this post of Audacity Databending Effects is an excellent resource to get started. All you really need is a copy of Audacity and a few images so it’s really quick to get into.