Ok, since this thread got very little play I did the unthinkable -- called the admissions director. Here's the scoop, if anyone cares:
You don't have to be a Stanford undergrad;
It takes 9 mo. regardless of where you did your undergrad;
21/50 were accepted this year;
Med school classes are allowed;
Deadline was Mar. 15;
Expensive -- ~$30K for 9 months.