I've updated the Weak References PEP a little: http://python.sourceforge.net/peps/pep-0205.html A preliminary version of the implementation and documentation is available as well: http://sourceforge.net/patch/?func=detailpatch&patch_id=103203&group_id=5470 Please send feedback on the PEP or implementation to me. Thanks! -Fred -- Fred L. Drake, Jr. <fdrake at acm.org> PythonLabs at Digital Creations