[Twisted-Python] Python properties and pb.Referenceable...

[Jasper]

I'm trying to set a python property on a PB client descended from 
pb.Referenceable, but it seems that properties don't work on old style 
classes and that Referenceable is descended from Jellyable, an old style 
class.  Moreover, I see this is still true for 2.0.0a2...

Is there any intention of switching to new classes, or should I just 
hack around this?
-Jasper