I'd say something smug about playing on the Xbox 360 but my Xbox just got shipped to Microsoft for repairs yesterday, so the smugness will have to wait 'up to 25 business days'. Also, I don't have Bioshock. Ah well, I just started playing Twilight Princess for the GameCube.
Here is a pretty detailed look at the copy protection mechanism that comes with the PC version of Bioshock. It is uglier than I expected: I didn't know games were using limited activations these days. That kind of changes the whole idea of 'buying a game' - the impact on renting and reselling games is huge. I wonder if that's clearly stated on the box?