code: function lookup(url, callback) {
  	console.log("Requesting hcard at " + url);
      Http.get(url, function(err, response, body) {
      	if (response.statusCode == 200) {
  	    var vcards = _findVcards(body);
  	    if (vcards.length > 0) {
  		return callback(null, vcards);
  	    } else {
  		callback(new Error("No HCard content in this profile page"));
  	    }
      	} else {
      		callback(new Error("HCard lookup returned HTTP status " + response.statusCode));
      	}
      });
  }
docs: /*
  Lookup for HCard content at the given profile url.
  
  The page is parsed for hcard markup and a JSON profile object is returned.
  
  @param {String} url
  the url of the profile page containing some hcard markup
  @param {Function} callback
  a callback function in the form function(err, result)
  
  TODO Support for HTML pages that are not valid XML.