How to implement facebook feed which shows the latest facebook wall post
Why not use the facebook like box plugin? If you're just looking for a widget like capability on your site, this is the easiest and pushes the heavy lifting on to Facebook's servers without any more modules or extra PHP:

http://developers.facebook.com/docs/reference/plugins/like-box/

Play around with the options, you probably just want to show the stream. There are other options below to customize the output of this as well.