I did a little search for photos shot with a Polaroid SX-70 camera. The film you use for those allows you to manipulate the photos while they develop. As with most photographic techniques, mastering the technique is the easy part. It is much harder to create an image where the actual technique adds another dimension and is not just some technical gimmick.
Anyway, earlier I posted a link to Chris Usher’s site. Cynthia Davis has a nice gallery., as have Michael Going and Gordon Montgomery. Klaus and Elke Wolfer’s website is partly German and partly English but, you know, you really just want to click on the images coz the translation is not that great.