Nice, I didn't know. :-)

Awesome guys.   Thanks for your input.   For others to see this is what I did.

My filter statement in the Forms and List configuration was set to Category LIKE '%[Querystring:category]%'

My code in my XSL template was originally just set to the following.

    <li><a href="Americanhttp://visit.salemva.gov/wheretodine.aspx?category=AM">American</a></li>

I changed to

    <li><a href="Americanhttp://visit.salemva.gov/wheretodine.aspx?&amp;{$prefix_param}_filter=American&amp;category=AM">American</a></li>

Then in my XSL I could "pass-back" the filter the user selected.

<p>
   <xsl:if test="$param_filter!=''">
   <strong>Showing: <xsl:value-of select="$param_filter" disable-output-escaping="yes" /></strong>
   </xsl:if>
   <xsl:if test="$param_filter=''">
   <strong>Showing: All</strong>
   </xsl:if>
</p>

This goes in the top of the program.

  <xsl:param name="param_filter" />