In this day and age, an increasing amount of people are reading technical literature on their ebookreaders (like Kindle or Nook), smartphones (iPhone, Android) or tablets. PDF, although great for printing, is not really suited for these formats (fixed layout, pagination, A4/US-letter, etc). These devices support a wide variety of formats like RTF, ePub, HTML or pure text, and often the easy way is to convert the pdf into one of these format.
This route has varying degrees of success (OCR, page breaks, ... lots of obstacles), and in this case, most software that I have tried (including Calibre) fails to convert this pdf into any format (parsing failures). Therefore it would make sense to provide another format in addition to pdf that is more easily read on electronic reading devices without a fixed format.
A simple solution could be just a single-page, downloadable html file (zipped with images and stylesheets). This would be the least amount of work and easily convertable to other forms. An ePub would also be nice (read on most ebookreaders, all Android devices, and easy to convert to Mobi format for Kindle).