All about Rails

FBML (Facebook Markup Language) introduction by Sunil Boodram

FBML is used to tap into Fackbook elements to ease application creation. It's somewhat similar to HTML. Ex: <fb:gogle-analytics> will generate the proper html to add Google Analytics tracking into your app.

Many of the HTML tags work in FBML. Notable exceptions include <script> and <style>. You may use css in your app, but it will be altered in order for it to not break the look of facebook itself.

Facebook provides an FBML test console, which saves repeated uploads to your dev server when building an application.

Check the FBML documentation for existing tags, they make life much easier!