I’ve made a pinhole specifically for shooting portraits with the NEX. It’s equivalent focal length is 55mm, which gives it a perspective similar to an 85mm lens on a 35mm camera. Here’s Jane, in one of a test series. Using electronic flash at f/180 or so is a challenge, since I want a nice light quality.
It seems to me that that the pinhole image is a really useful portrait medium because it suppresses detail but retains the essence.