helpers.js

var getOwnProperties = function(model){
  var props = {};
  for(var prop in model){
    if( model.hasOwnProperty(prop) 
        && prop.indexOf('__ember') < 0
        && prop.indexOf('_super') < 0
        && Ember.typeOf(model.get(prop)) !== 'function'
    ){
      props[prop] = model[prop];
    }
  }
  return props;
}

Another variant would be to slap on the getOwnProperties on the Ember.Object.prototype so all objects have it. http://jsfiddle.net/algesten/5Hj9E/

Now extra nice would be if we were to inspect functions and see if they have been marked .property()... that's the next level :)