Strictly for those really fascinated by foreground miniature photography:
Asteroid is a 16 minute short, shot on super 8mm, for $800, in 1981.
It's not a good movie, by any means, but it has some excellent compositing. Well, more exactly, they use foreground miniatures in a couple shots and it looks really good. They shot at F22 on a super-8 just to get the right depth-of-field.
The Flickr page with the articles from Cinemagic.