It says 3 hours. It would have taken 3 weeks when I was a 56k'r.
Dude, I'm so glad you were finally able to join us and get out of the dark ages.
So I played through the demo (about 30 mins first time through, much faster second time) and I have to say I'm really intrigued by the weapon/plasmid combat system. It kind of reminds of Clive Barker's Undying. (Funny enough, Bio Shock is based on the UT3 engine and Undying was based on the UT engine) Undying was better though because it's spell casting system was off hand: you could fire a revolver with your right and chuck a fireball with your left. In Bioshock, you have to flip back and forth.
Some really scary moments in the game, and some real gore; not for the squemish. But the polish and the details are amazing. In one part, where some airlocks are starting to burst from pressure, you actually see fish coming in through the holes and flapping around on the ground! The story is really interesting too.
At the end of the demo, there's a cool video that shows you some of the stuff you can do in the game, which I'm really intrigued by: snatching projectile weapons out of mid air and hurling them back, setting an opponent on fire and then sending a heat-seeking missle at them, or planting a mine and putting a hologram of yourself on top of it.
My only problem with the demo is why the heck would anybody, without any prompting, jab a syringe with some unknown substance into their arm?!?

(did anybody else notice the tattoos on our hero's wrists?)