You can now find the first official release of the OO Objects for Max on my user page:
We developed two simple but powerful externals, oo.method and oo.call, that enable you to apply OO techniques within Max. This vastly improves the manageability of complex Max patches.
The objects are Mac-only for now. So far they have been tested by a select group of experienced Max users but we are interested in more user experiences before we start the development for Windows. Max 5 versions will come as soon as Cycling '74 releases the Max 5 API.
All feedback is appreciated!