BioShock Demo is up on Marketplace

[Bond]

Game Informer gave BioShock a 10:

10

CONCEPT: The creators of System Shock 2 have honed their craft to create an FPS that is as adventurous as it is powerful

GRAPHICS: In almost every room, you’ll stop to carefully analyze the amazing detail applied to every surface and object. It’s one of the most beautiful games out there

SOUND: The classic music, haunting voice recordings, and sound of insanity blend to create an eerie and intimidating array of sound. The surround sound support is also of a higher level than you usually hear

PLAYABILITY: No matter what weapon or power you have equipped, you always feel like a god

ENTERTAINMENT: The power to destroy has never been so varied and satisfying

REPLAY: Moderately High

Source: Game Informer Online

Link goes to the full review, also with a second opinion from another author who gave it a 10 as well.

This is a definite game of the year candidate.