> I would generally recommend a nested-set model instead;

Thanks for the suggestion.  I see the nested-set model as being an
alternative to acts_as_tree.  Unless I am mistaken they are 2
different ways of doing essentially the same thing.  Both could be
helpful in creating a hierarchical view but neither provides a slam-
dunk approach to that end.

I think I see where I stand.  Thanks to all who responded.

        ... doug

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