Now I know what "sightly paranoid" is meaning :-)
Consider filling your laptop with epoxy for a more difficult physical access (but I guess this would result in overheating problems)
For me, encrypting home + swap is enough. I just came to your site to figure out how I can block the firewire DMA access.
But if I ever need a PC for developing my world dominion plans, I will come back to your HOWTO.