There are many ways to to use notify.me with facebook, here are some of the most common ways to do so.
Friends Status Update - What your friends are up right now on Facebook
Click on 'Friends' and then click on 'Status Updates'
Copy the link location for Friend's Status Feed that appears in the left hand column
Follow the step to add a source to notify me located here.
Notification Feed - Updates when someone sends you a message, invite request or posts on your wall.
Click on Inbox, then select the Notifications tab
Copy the link titled 'Your Notifications' from the lower right of the page in the section titled 'Subscribe to Notifications'
Follow the step to add a source to notify me located here.
Facebook has many feeds that you can use in notify.me to stay up to date on your facebook account and be alerted when new content becomes available. Add the feeds you're interested in to your notify.me by following the steps outlined here.