No doubt there can be some interesting people shots done with the extremely long shutter speeds and ultra tiny apertures commonly associated with pinhole photography.(posted 8544 days ago)One thing interesting to do is to take a photograph of a large area where people congregate and use the picture to see which people move the least.
Also, with a powerful enough strobe (well, ok, maybe you need four novatron 750 Ws units :), you can do fairly normal portrait photography, in addition to some incredibly bizarre perspective distortion pictures depending on how far from the lens you mount the film.
Your creativity is the limit, I guess. Don't forget to post up your images on here :)