I don't think he ever finished his PIC design.
That said, after having used my Quad Cree as a single stage for over a year now, I truly think that a single stage for a high-powered light definitely has its merits. Most of the time you want a multi-stage light is either for long runtime, or for less light, to not ruin night vision. For either of these purposes, a much smaller light is far, far, better, and you would need to be carrying a spare light anyway. So an HDS or similar paired with a single-stage Quad Cree (full power when you need it, also dumb-proof for when your friends borrow it - and believe you me, if you take it with you camping or something, they will clamor to borrow it!) is a perfect and ideal combo in my opinion.