And the solution is to add the getDocVars API addition as follows:
// Usage: [[portfolio?id=x]] Â Â Â
// x = the document to show, NOT wrapped in [~~]
$output = '';
$docInfo = $etomite->getDocument($id);
$docVarsInfo = $etomite->getDocVars($id);
$docImage = $docInfo['content'];
$docTitle = $docVarsInfo['imagetitle'];
$docDescription = $docVarsInfo['imagedesc'];
$output = <<<EOD
<div class="portfolioSection">
  <div class="portImg">$docImage</div>
  <p class="portTitle">$docTitle</p>
  <p>$docDescription</p>
</div>
EOD;
return $output;

Thanks for forcing me to go pokin' around in the main index file... some other interesting stuff in there methinks!
update: minor rev to the way it builds the output to eliminate having to escape quotes