> I already implemented c) once for fun.
> See the thread starting at
> http://lists.squeakfoundation.org/pipermail/squeak-dev/2007-June/117840.html
> ... and my arguments for moving Dictionary and Set under a common
> HashedCollection
> http://lists.squeakfoundation.org/pipermail/squeak-dev/2007-June/117894.html

Well, that changes things.  I thought it would break a lot to change the 
superclass of Dictionary. :-( GNU Smalltalk also uses HashedCollection 
for the record.

Paolo