@digory: thanks for spending the effort to create this!
I seriously suggest to "outsource" this into a Wiki page though (you can create one right here at the mobileread Wiki, maybe called "Kindlet HowTo" or so).
You could start by simply "dumping" your current HOWTO into Wiki format, perhaps including a section for a simple "Hello World" Kindlet, and creating links from the known K4/K5 Wiki pages to it.
The major advantage of a Wiki page over a forum thread is that everybody can improve it, anytime, without you having to keep track of it. For a working example, check out the Kindle Touch Hacking
It may take off slowly, but if there is enough interesting/useful content, people will contribute and gradually make it more and more valuable.
PS: I just tried to find my post where I originally proposed to introduce a Wiki for Kindle Touch-related hacking. It was only half a year ago, and yet no search engine (neither mobileread's own, nor Google, nor anything else) would turn up anything. But that just proves my point, which led me to initiate that other Wiki page: there is a lot of information in forum posts, but it tends to get buried quickly. Let's extract and refine the important parts of that information, and let it flow into the more "durable" Wiki pages.