In my previous article I was playing with RJS templates and finding easy way to generate them. Well Thomas just posted some new goodies see http://mir.aculo.us/articles/2006/01/21/new-inline-rjs-for-rails. For quick updates no need to have a separte .rjs file.
class UserController < ApplicationController
render :update do |page|
:partial => ‘user’, :collection => @users)
page.visual_effect :highlight, ‘user_list’