Also updating his .plan is Jake Hughes who says the team is trying to ready a demo for release tomorrow, for those wanting to try before buying.
QA is beating on the patch now. It takes them a while to do a complete playthrough. The instability was being caused by an extremely subtle and devious buffer overrun in the filesystem code. Win2k tends to be more sensitive about this, which is why the bug was more apparent on that OS. This means users of ALL OSes should download the 1.01 patch when it becomes available (probably no sooner than friday night):