Soon I will be releasing a beta version of the new Republic-Online, it will even have a completely new name. I must say I have used A LOT of AJAX to build it, and it is phenomenal what you can do with it with a bit of creativity.
Javascript is already powerful in manipulating web pages, and now that you can interact with the server as well, all kind of things come to life.
All I can say is this will be revolutionary stuff, that no-one has done before. A lot of the game does things that previously would be coded in Java or Flash, but are now easy to integrate into the actual HTML and the web page, making it much quicker, versatile.
Have you tried using jQuery? it is much faster to code JS effects such as AJAX and the such… ANd it has excellent effects library built in via one function each…