I don't mean to hijack (well, maybe), but how about the same question for the JSD (SJD?)
I realize that it's supposedly a research degree for those interested in academia (or so say the websites), but what about particulars? How long does it take to complete? And mostly, why? 99% of law profs either have JDs only, PhDs only (a smaller number, naturally), JD/LLM, JD/PhD, or some other wacky combination. But I don't know/haven't seen a single prof (at least at my school, a T10) with an SJD.
WTF is the point?