Well, it might be a bit redundant but hre's another link...
http://www.geocities.com/beckster05/Agincourt/AgBattle.html
No suprise really that a mass-produced bodkin point from a longbow could be deflected off of expensive plate armor from a master smith. However the fact that these arrowheads were the point of choice indicates that they did have considerable value. Armor was privately purchased, the quality of said armor would presumably vary.
Also, as other have pointed out, a bodkin point travelling at the velocities inherent to a 130-140 pound draw could at least partially penetrate chain mail, and even an inch-deep wound inflicted by a point firmly wedged in place by chain mail would be debilitating.
It is of interest to note that, this late in the Medieval Period, picks and bodkins (??? daggers consisting of only a spike) appear. Both with short, stout points designed specifically to punch a hole in armor or mail, the pick wielded like a club, the bodkin like a dagger.
How many of the French fell to longbows is open to question, but surely many must have, as well as the horses. The link implies that it was the effects of the English arrow storm that launched the impetuous French charges after four hours of waiting.
Of course what really did in the French was their own egos and disunity, as well as ingrained contempt for fighting commoners. The English common soldiery however, hard-bitten campaigners with no illusions of nobility, had nowhere to run. Perhaps the real import of those Agincourt longbowmen might be that they were an early precursor to a modern army.
Point of trivia, in England one shoot someone the bird not with a single raised finger but with a sort of backwards "V" for victory sign. British lore has it that this obscene gesture dates from this same era when English archers were threatened by the French with the amputation of their bow fingers if captured. These same archers defiantly holding up these same fingers to the French prior to altercations.
I recall reading somewhere that the English army was stricken with persisitent dysentery during this campaign, many soldiers fighting at Agincourt naked from the waist down. Edward himself died of a similar afflication in France a few years later.
Birdwatcher