For interested persons who are running the very latest ruby_1_8 branch, here are
two distributions of sandbox:

  http://code.whytheluckystiff.net/dist/sandbox-0.0.28.tgz
  md5: 4a44887f42bfd59c5ac21295a834274b | size: 51622

  gem install sandbox --source code.whytheluckystiff.net

This version contains a cool Sandbox#import feature which lets you copy entire
classes or modules (along with their supers and singletons) into the sandbox.

However, it doesn't preserve the access levels of the methods.  Every method
becomes public.  I would like to extern rb_get_method_body, since rb_method_node
ditches the noex.  Would that be okay?

_why