2.0 style: Ajax Live Search for Wordpress

Recently I stumbled over a german weblog that had a great surch function: you would simply type a term into the search box and after a second or so the search button would change to a small spinner and then the page gets reloaded to a search result. Pretty web 2.0 fancy ajax
I haven’t found the time to install the plugin here but at least I have found out what it is called and where it is from: Wordpress Live Search Plugin