101924 Web 2.0 site with php/ajax

We want to re do our current site but we want to use Ajax/php/mysql. So we are looking for coder who has actually done some web 2.0 site with ajax on it and a site which can handle lots of traffic. please let me know. Please only bid if you have done similar site or show me an example site you done. I'm not looking for coder who can try to do it. I need a group also so we can finish this in 3-4 weeks, also you are free you reuse your exisiting code.