Snapshots are not distributed from ftp.freebsd.org on a regular
basis, due to load on our mirrors.  Snapshots may appear here irregularly
if there's a specific testing goal to be achieved, but otherwise please
look on ftp://current.freebsd.org/pub/FreeBSD/snapshots/ for snapshots of
the latest versions of FreeBSD.  If there are any snapshots here, they
will reside in the ${ARCH} (i386, alpha, sparc64, amd64, ia64, etc)
subdirectories.