I've been trying to reply to bbum's post, firstly my comments were removed as spam, then he approved them by hand, now they're gone again. So here they are again.
I wrote [in this blog] much about my experiences getting OPENSTEP/Parallels working. Networking's fine but slow, graphics is good, mouse is a bit jumpy. I was talking at WWDC with people who say that Microsoft VPC no longer supports OPENSTEP/Mach. You definitely can't boot native on a new Intel Mac, as there's no SATA driver (and no way to use a boot floppy).
BTW, the floppy images are available over HTTP from Apple: OPENSTEP floppyimages