Wow, my parts supply sucks. Just put a bike together for the wife and that doesn't help.
Basically, to put a SS together for him I need:

frame
fork
cranks, BB
singlator
pedals (he prefers flats and I.... don't. ;-) ).

I have wheels, tires, bars, stem, post and seat, cogs and chain. I do have some rim brakes but he really loved his BB7.
As I said, I could see handing down my Manitou Scareb (80mm, disc only) if I could find a decent, not-outrageous upgrade for myself for my Superlight. On the other hand, going rigid might knock some humility into him!

Chris