well, the site for the update is still down. you can find more info and screenshots of the game on this site. here are some links for screenshots:
http://swankyplace.com/forumimgs/potc_promoshot11.jpg new fog :Oo: REALLY murky crud
new cannonfire physics: (these also show the new sails taken from age of pirates)
http://swankyplace.com/forumimgs/potc_promoshot12.jpg
http://swankyplace.com/forumimgs/potc_promoshot13.jpg
those screenshots don't show the new smoke. it hangs around far longer and forms into a big long plume of smoke now. it can make a battlefield VERY foggy at times.

but it sure is fun, and very realistic.
the menu has now been greatly improved:
http://swankyplace.com/forumimgs/potc_promoshot1.jpg
http://swankyplace.com/forumimgs/potc_promoshot2.jpg
http://swankyplace.com/forumimgs/potc_promoshot3.jpg
http://swankyplace.com/forumimgs/potc_promoshot4.jpg
http://swankyplace.com/forumimgs/potc_promoshot5.jpg
new daily info on the world map (upper left corner):
http://swankyplace.com/forumimgs/potc_promoshot6.jpg
the new ship 'ketch':
http://swankyplace.com/forumimgs/potc_promoshot7.jpg
it's basically a sloop with an extra mast, and it's very fast.
this one shows the new smoke a bit, but it has already faded pretty much. for those who know the game, that ship in the most left part of the screenshot that isn't quite on the screenshot is a manowar! :thumbup:
http://swankyplace.com/forumimgs/potc_promoshot8.jpg
light drizzles of rain and the new treasure galleon in the background: (it basically just has a new coat of paint and different stats)
http://swankyplace.com/forumimgs/potc_promoshot9.jpg
and another unimportant one to finish it off:
http://swankyplace.com/forumimgs/potc_promoshot10.jpg
note: the game has nothing to do with the movies, but things from the movies such as jack, norrington and the black pearl have been added into the game. i'll post a screenshot of the new black pearl soon.