Facebook finally allows Javascript

Just launched today! Like HTML/FBML before it, facebook has developed their own flavour of Javascript and named it FBJS. Looks like it'll be a slightly modified, slightly crippled version of Javascript, with nearly identical syntax and a good subset of built-in objects and methods. Can't wait to try it out... I wonder if I'll be able to include an external script? Probe around the user's browser for interesting "intelligence"? will I be able to manipulate the DOM to produce wacky customized effects? My goal is to create an app that finds every instance of the word "facebook" and rewrite it as "farcebook". ha ha. ha. ha. (snort) well you know I'll keep you posted... ciao