Nice series of images. Did you use the Holga 120-WPC? It a very nice pinhole camera, I have one myself. I take it always with me on holidays. Light to carry and easy to use with a very small bendable tripod.
I (almost) only use very-old-and-not-properly-stored films for my pinhole photography. I had good results with Fuji NPC, Fuji NPH and Konica 400PRO films. Old Kodak Gold film is often useless, since it turns into a muddy brown. The Fuji films however give beautiful almost pastel colours (blue sky, green grass). I'm an almost only B&W photographer, but with pinhole I seem to use mostly colour film. Maybe because the colours are (nicely) off due to old film and the pinhole lens?? See for instance my entry in the previous MSA: http://www.apug.org/gallery1/showima...mageuser=60001
Bert from Holland