[Kazilan]

For those who are curious, the requirements were released (taken from 2kgames' bioshock forum):

BIOSHOCK PC SPECIFICATIONS

Operating Systems:
Windows XP (with Service Pack 2) or
Windows Vista

Minimum System Requirements:
CPU: Pentium 4 2.4GHz Single Core processor

System RAM: 1GB

Video Card: Direct X 9.0c compliant video card with 128MB RAM (NVIDIA 6600 or better/ATI X1300 or better, excluding ATI X1550).

Sound Card: 100% direct X 9.0c compatible sound card

Hard disc space: 8GB free space

Looks like I'll be able to run my preordered copy, although at low settings. Only about a month to go!