Jim, Brian, and others, I have set up the wiki for a change I'd like to make to the Zope core that would enable us to create and access singleton objects reliably. This would breathe new life into the PTK. The change to Zope would be minimal and low-risk, so I'd like to pursue it immediately. http://dev.zope.org/Wikis/DevSite/Proposals/ReplaceableProperty Shane