Well done for releasing something in creative commons.
One of the challenges of projects like this is that PDF's are generally where information goes to die, not to be forked, improved and merged back into the branch. So I'm interested how I could contribute to this as an open source project, if it actually is one?
Like many people I find it very difficult to do simple things. School, university and work teach us that complex problems are rewarded better than simple ones. These guys show how to find problems that worth solving instead of finding just complex problems.
Futurice have done amazing work to put this all together. To get started it's best to do it with an experienced work shopper but after that this is everything you could need to really develop new product effectively.