But I can tell you my starting points: there are few threads on bitcointalk that try to ID satoshi, start with those, then read a bunch of papers, figure out who the co-authors are and sooner or later you'll end up with the same set of names. The interesting bit to me is that those two groups are both roughly equally likely but I can't find any clear signs of collaboration between the two.
If PG emailed you, would you tell him in private?
This is a pretty good starting point:
Was this done out of some ideological commitment, or just to get rich as the first movers?
Same with the reason behind creating this particular crypto-currency. Since the creator is not known to public we can only assume.