Cydia: Bringing Debian APT to the iPhone
Incredible Mobile OS X project from Jay Freeman: a port of Debian’s APT with a complete, working BSD and GNU Unix userspace tool set. And a brand new GUI app to manage it, Cydia. And, unlike Installer, the whole thing is open source. Gerd Kamp points out that Freeman also ported PyObjC to Mobile OS X, allowing native iPhone apps to be written in Python. My vaguely informed hunch is that the official SDK from Apple won’t even support that.