This sounds like an issue that people use "facets" to work around, where a "facet" is essentially a single taxonomy, and you effectively have several unrelated taxonomies that would aid navigation. I don't know if this sort of thing has been implemented in drupal modules--I just remember the term from a similar discussion about a different CMS.
ari
Quoting Chris McCreery <chris.mccreery@gmail.com>:
> I though I did but couldn't find one that allows taxonomy terms to be
> grouped in the views. Did I miss one that you'd recommend?
>
I don't have a recommendation for existing modules but I found
http://drupal.org/node/162374 with Google; does that help?
Earnie -- http://for-my-kids.com/
-- http://give-me-an-offer.com/
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