That was a long time ago on an earlier BSDI.
The current BSDI build made on BSDI 4 will NOT run anywhere else that
we know of (you're free to download and try it if you're a glutton).
We've wanted to do FreeBSD for a long time and still plan to, but we
hit some snags with it and just haven't had time to devote to making
it work there.