You can clone with
HTTPS or Subversion.
I think the Facebook Connect message should say "We'll never post to your wall" not "We'll never spam..."
a) The current phrasing requires me to rely on your definition of spam, I don't know if that's different from mine!
b) Spam is a bit jargony.
N. B. We don't post to Facebook walls automatically at all - so the user actually has to initiate any post to their wall.