[Zope-dev] __replaceable__ or whatever it is ;-)

Hi, I was wondering how the stuff for attributes that are replaceable in instance and singleton attributesis getting on. Itamar says the code is in the CVS for Zope, but neither of us can find any documentation. Could whoever did the coding please put something in the Interfaces Wiki or point us to where the official documentation lives? Also, when is it going to land in a erleased Zoep version? 2.3 I guess... cheers, Chris