From AICN, Quint (Funnier than Harry, 2nd best reviewer on the site, after Moriarty...)
Jonathan was the guy who wrote the short story that Christopher turned into MEMENTO and has co-scripted THE PRESTIGE and the upcoming DARK KNIGHT with his brother. Actually, if my information is correct, I think Jonathan is the sole screenwriter on DARK KNIGHT, which I hear is a helluva script, although I haven't been able to get my hands on it... yet...