Doug,

2.0b3 is really buggy, and you should be running either 1.03 or 2.0b7. 2.0b7 has its own share of bugs, but it's not quite as bad as 2.0b3.

If you're running a Hijack kernel, make sure you have the latest one. I think he fixed a bug recently where it might say "no hard drive found" in certain situations.