pytey, musclenerd, and planetbeing from the iphone-dev team gave a presentation at the 25th Chaos Communication Congress (25C3) in Berlin December 27th.
Heads up - its heavy in the technical details, mostly a video white paper vs anything dramatic. For any of you with any technical or developing skills though, this might be an interesting video to watch/listen to. Its nearly a full hour long, so watch while you've got some time.
This is by far the fullest presentation on the methods used to hack the iPhone.
Google Video via hack a day