Recently, I have been trying to customize my own Facebook Page and have found this great tutorial on how to customize your Facebook Page!
The author details the use of FBML Static Page App that helps you to add your own custom code:
Do a search for “static FBML” on Facebook (or just click here), and click “Add to my Page” in the upper-left. A dialog pop-over will appear with a list of Pages you administer. Select the Page you want to customize by clicking the “Add to Page” button next to the Page, and when you click the button it will disappear from the list. Now click “Close”.
And some basic info on FBML code:
Beyond simple HTML you can also enter very simple FBML tags to simplify some of the process. FBML stands for “Facebook Markup Language”, and is meant to be a shortcut for use in Facebook applications. Facebook has also enabled the use of a subset of FBML in the Static FBML application. FBML can be a great way to reduce the amount of HTML you need to enter, while at the same time keeping Facebook’s own look and feel. The format is very simple, and if you are familiar with HTML or XML you’ll pick it up very quickly.
Also, don’t forget to play with Facebook Circles!