proof-of-concept: allows you to write <key>Update: functions instead of putting all your code inside update()

gistfile1.js

// Add this to your custom view or render delegate (see comment below for the rest).
update: function(jquery) {
  var fn, key, displayProperties = this.getChangedDisplayProperties() ;
  for (key in displayProperties) {
    if (!displayProperties.hasOwnProperty(key)) continue ;
    if (fn = this[key+'Update']) fn.call(this, jquery, displayProperties[key]) ;
  }
}

Example usage:

displayProperties: 'title value'.w(),
titleUpdate: function($, val) { $.find('.title').text(val); },
valueUpdate: function($, val) { $.find('.value').text(val); }