I think RED5 might be lost.
I've never used anything on my fingerboard. Just keep it clean (use a little rubbing alcohol if there are cruddy spots). That's not to say that there aren't other opinions, even some from luthiers who know a lot more than me. See
here or
here,
here (a good read), or
here.
Ebony can dry out, so I don't think oiling the FB is a bad idea, it just hasn't been necessary in my experience. I think the school of thought for guitars is different, perhaps because a fretboard is much thinner and has frets in it which can pop out or do funny things if the wood shifts a little. I'm just speculatin'.
EDIT: Check out
Arnold Schnitzer's page.