Thanks to Kerri, I've discovered a new plaything for the iphone. They don't really seem to belong anywhere else, but they do fill criteria for being photographs, and in colour :)
I think there is some software for computers to do this but I have no idea what it's called, I love this app, just so simple! here is my first one :-) Moonta Bay by mertlee, on Flickr
Thanks, Luke. I'm trying to decide whether I want to try this in Photoshop or just attempt to optimize the iPhone app. I'll probably lose interest quickly and move on to the next special effect...