A pbulk run is currently running on a 50 MHz m68060 Amiga, plus a little help (manually compiling packages) on a 35 MHz m68040 Mac. I have a couple more m68040 Macs to add soon.FWIW, in Debian, we're using qemu which recently gained pretty good emulation support for building packages for m68k (previously, only ColdFire emulation was supported). By using the emulator for building packages, we also helped fixing quite a lot emulation issues in qmeu.
Perhaps we can nudge Jason to see if he'd be willing to look at NetBSD/m68k in qemu... ;)
John