Cooliris is a online photo surfer for the iPhone. It fetches photos from the web – via search from Flickr, Google or yahoo, or via predefined channels like Sports, Tech, Business etc…
The app opens with a picture wall with many random images, you can scroll through them, zoom in, and even mail them. Cooliris supports both Portrait mode and landscape mode.
Update: I have not been able to figure out how to save these images; taking a screenshot or emailing the pic seems the only option.