If you use Facebook, you might want to look at 5 Big Changes to Watch in Facebook's Upcoming Redesign by Ben Parr for Mashable. I would hate to think that you would log in to find a bevvy of surprises without proper warning.
Facebook hasn't yet been a target of this blog. One of the reasons is that the site is constantly modifying its appearance and objective, making screenshots and instructions rapidly out of date. (Another reason is that I haven't had the time to sit down and hold your hand while I walk you through it.) But I'll get to it eventually. Until then, you can check out this social network overview and Mashable's article linked above.