Seems like the latest thing in pinhole photography, is making 3 month, 6 month or even year long exposures. Several artists have recently been featured in exhibitions and articles using this technique. Check out these artists.

“The Arc of Time” an exhibition of long-exposure photographs made with a pinhole camera by Utah photographer Matthew Allred
Six month [...]

stenop.es from Romain A on Vimeo.
Stenop.es: Photographers Romain Alary and Antoine Levi are currently making a series of movies transforming a variety of apartments into Camera Obscuras. The two movies that are already out, Paris, France and Ghat, India are lovely and mysterious, reminding me of the work of Abelardo Morell who has been [...]