I am working on a high school class reunion (to be held 2 weeks from today) and lots of folks on the committee were talking about their Facebook accounts, all their friends, etc. My curiosity was peaked, and now I need an intervention. I am hooked.
I do use it to connect with my kids (although some of their friends make some pretty crude comments on their pages) but it has been wonderful for class reunion reconnections. I have connected with cousins I'd lost touch with, old, lost high school friends don't seem so "removed" anymore, I've gotten better acquainted with some work colleagues who reside all over the world, I keep up on the little nephews' antics through my SIL, and my 85-year old MIL just joined!
I use it with close friends to arrange weekend plans which is pretty cool. We became "fans" of some local restaurants and get notifications when they post new coupons. It is so much more than I ever thought it was, but it is consuming more & more of my days. I'm on TUG less, just for example.
Searching for friends is easy. After you set up your profile with your city, state, etc., along with your networks, it does faciltate finding friends. I can't explain it - you'll just have to try it.
TUG is on FB, by the way. Try it, you'll like it.
I was very concerned about privacy, but you can tweak your settings to be pretty restrictive, for example you must be my friend to see any of my posts on my wall, my photos, profile info, etc. Most people do it this way.