ftp://ftp.ruby-lang.org/pub/ruby/1.8/ruby-1.8.2-preview4.tar.gz
  md5sum: 2f53d4dc4b24e37799143645772aabd0

  The final 1.8.2 will be out on December 25th (JST), unless any
  critical bugs will be found.
                                      matz.