I have downloaded 2-0 iso image
  148996096 Dec  7 08:53 macppccd.iso
and checked on iBook/366, PM7600, UMAX S-900:
  iBook/366 boots fine with
    boot cd:,ofwboot.xcf
  PM7600
    boot scsi/sd@3:0      .... nothing happens, 
  S-900
    boot scsi-int/sd@3:0  .... nothing happens, either 

While I am using my 2.99.15 iso image at
  ftp://ftp.ki.nu/pub/NetBSD/snapshot/20050214ts/
    macppccd.iso  	86336 KB

  iBook/366 boots fine with
    boot cd:,ofwboot.elf
  PM7600
    boot scsi/sd@3:0      .... boots fine
  S-900
    boot scsi-int/sd@3:0  .... boots fine

Please note mine does not have X11, and needs customized X11.

Just for your information,
---
Makoto Fujiwara, 
Chiba, Japan, Narita Airport and Disneyland prefecture.