I'm starting to feel enough free energy to explore implementing SRFI 170
for Windows. Since Harold has some code for Chibi already and Chibi is
the most familiar FFI to me as well, I could do the initial Windows
implementation in Chibi.

I'm under the impression that Gauche, Gambit and Racket have a lot of
Windows support as well, and Kawa and IronScheme get it via JVM/CLR, so
it'd be good to check that we don't specify anything that's hard to
implement on those.

On the Unix front, my Linux/BSD/Solaris virtual machines are ready as
well. Harold, let me know when you have something I can try :)