i enjoyed it.
went with a couple friends who didn't get all the nerd references and stuff that happened in it, but they still liked it too.
good movie, not the best, but entertaining.
http://www.ilounge.com/index.php/articles/comments/new-in-iphone-os-4-the-full-app-by-app-breakdown/
they just cleaned up a lot, pretty much.
and if you do jailbreak it, make sure you do it right, don't want to mess it up.
it looks amazing.
i'm not so sure how it can stay under the bioshock name with all the differences, but the story will most likely pertain to the story of bioshock 1 and 2.
regardless, i'm a fan.