Two very important things, so as to not confuse the present with the past
status:

1.  The NetBSD 1.5.1 INSTALL notes describe how to use sysinst to install
on *all* supported models, including Open Firmware 3 machines.  You don't
need to  manually install the distribution sets or build devices.  This
includes all models after the iMac.

2.  The NetBSD 1.5.1 release supports the built-in keyboard on the recent
laptop models.  You don't need to find a special kernel, patch the ADB
driver, or manually install the distribution sets.  This includes all
supported iBooks, and the PowerBook (FireWire) and PowerBook G4 (Titanium).

The same two go for -current.

  -- MW