Hi @chrismallory
If you want to move say just the default subcategory navigation block, to the main content area it can be done via the layout:
<catalog_category_default>
<reference name="content">
<block type="catalog/navigation" name="catalog.contentnav" before="-" template="catalog/navigation/left.phtml">
<block type="core/text_list" name="catalog.contentnav.state.renderers" as="state_renderers" />
</block>
</reference>
</catalog_category_default>
Note: that this will only work for non anchored categories.
I hope this helps :-)