K5 How Do you actually write apps for the kindle?

Folks,

Suspecting that there is going to be a slightly embarrasing answer to this question, but anyhow: here goes.

I have a kindle 4 touch - I've been following along with the weather station hack which is working nicley. I felt I wasn't really taking advantage of the touch screen and was interested in what one could do with a custom application.

I skimmed through the forums and didn't really see a 'getting started guide to developing for your kindle' and wondered if someone could point me in the right direction

Thanks, Ace