I just installed LinuxPPC 2000 onto my iMacDV this morning, and it seems to work OK, though some settings don't seem to want to stay set.
I figure this is most likely because I'm still booting into Linux with the CD. I'd like to boot directly from /boot, but the instructions for doing this make no sense to me.
It involves editing the yaboot.conf file, which is trivially simple, but the manual talks about this as though I were editing the copy on the CD!
I've run a search for yaboot.conf on my hard drive, and it comes up with nothing.
If anyone else has managed this, please let me know how you did it.