It's easy to be tempted by the latest and greatest equipment. More megapixels, more frames per second, more user definable modes. A bigger, faster piece of glass. A flash card that writes a billion bits of code every second.
Then there's this:
Download the PDF, print and build your own pinhole camera. I have not tried this because I don't own any opaque paper, but it sure seems neat, and even cheaper than a Holga.