Ghost Ships Menacing Test Servers Soon
May 15 2008
New Ghost Ships are coming soon to Pirates Online, bringing with them crews of brand-new enemies! Shortly, you will be able to find these undead ships on the Test Servers terrorizing passing pirate vessels. Check back here for more details on when Ghost Ships will sail into the Live game.
-----
Just to add my guess to this, I would say "ghost ships" and "new enemies" probably refers to the new spaniards and french we saw in the concept art. I could be wrong though, I have been before. ^^