Apparently people occasionally visit my profile page, which is really nice! But I rarely post here, so I thought I'd link you guys to the Jailbreak Development Blog, which is a pretty inaccurate name for what is basically a slowly growing mass of tutorials about how to do everything we've done in Jailbreak in your own mod.
We're covering every element of modding that we can, in as much detail as we can (including programming) so make sure to check it out!