The amiga port is basically the NetBSD/amiga port but with support for using ISA peripherals via a bridgecard. Currently supported bridges are the GGBus+ (aka GoldenGate II) and the CrossLink. None of these support ISA DMA so unfortunately this won't bring you support for PC floppies. Tested ISA devices are com, lpt, ast & if_ed, but most non-DMA drivers should work pretty much out-of-the box.
Snapshots are made available from time to time.
The maintainer of the amiga port is Niklas Hallqvist <niklas@openbsd.org>.
www@openbsd.org