> This template will probably work (to match last 'p' element)
> 
> <xsl:template match="p[not(following-sibling::p)]">
>   <!-- template contents -->
> </xsl:template>
> 

Only if all the p elements are siblings (in which case p[last()] would also
work). 

The following should always work:

<xsl:template match="p[not(following::p)]">
  <!-- template contents -->
</xsl:template>

Michael Kay