Actually, I think they're more known as "Hockney Joiners". David Hockney is a painter who has also done some experimentation with photo collaging, both with polaroids and prints from a 35mm p&s film camera (iirc, he just had them developed at the local drug store). If you ever get the chance to see one in person, I'd say grab it. Some of them are cubist in the way they play with time and space--like this portrait he did of his mom:
It's not just a simple pano technique.