I got the cannons firing on the pirate ship tonight and started making my notes for the NPC ship AI. I plan on having "merchant" and "man-o-war" ships. The man-o-war ships will be the navy that patrols around and attempts to attack the pirate. The merchant ships will be prey for the pirate. :)
Anyway, I started on the man-o-war AI tonight and as soon as I get something workable I will put up a prototype of the game so you can run like mad from the man-o-war!