OK, my ideas about the Bootstrap thing....
Didn't they need blood to make it work and if Bootstrap was one of them (sombie like) wouldn't it follow that he didn't have any producable blood? That being the case, finding him wouldn't amount to much.
My two observations, three actually, were...Great special effects, that moonlight to regular light stuff was seamless. Also, I am wondering why the "eye makeup" of Capt. Sparrow? Kind of made him look more like a cross dresser than a pirate. Real puurrty though ;-) and finally the incorporation of the "ride scenes" were done really well. Generally a good movie, much better than I expected.