I should really just write a rant about the concept of hit points, and how you don't just brush off a boulder falling onto you, how that really means that you dodged out of the way, just like you would if you were taking vitality point damage, maybe just getting hit by a few stray bits of rock as it crashes to the ground or something like that.
But I won't write that rant, because we all know what I'm going to write anyway, right?
With appropriate flavor-text, normal hit points work pretty well, and you don't actually have the problem you just described, Angcuru. That said, I like the idea of VP/WP, because I like the idea of a poisoned weapon that only does its dastardly badness if it actually hits the person -- meaning WP damage, as opposed to VP damage. That's much better than trying to tell a person that they got the enormous debilitating poison into their system after taking 3 hp damage from their max of 190 -- "Yes, that's a scratch that didn't really even break the skin, but the poison just killed you. Sorry."
Not a horrible problem -- the "little scratch" theory does well enough -- but I'm looking forward to seeing how VP/WP works in D&D.
And really, a dragon getting a good-sized chomp on you SHOULD kill you, no?