Sorry, the 32 of you (as of this moment, out of 152) who claim to never have had a facebook account. I call shenanigans. I don't believe for one second that 20% of a sample of hacker news readers never, ever had a facebook account.
The people I want to stay in touch with, I stay in touch with. Those I don't, I don't.
It really is that simple. You don't need facebook, or anything else, to stay in touch with the people who are important to you.
I call shenanigans on anyone who thinks facebook is a required part of life. Or Twitter. Or any other "social network" for that matter.
If you use it and enjoy it, that's great for you. Keep using it, keep enjoying it.
I'll stick to emails, phonecalls, IMs, and text messages. Hasn't failed me yet.
I find Twitter both entertaining and useful and a little LinkedIn is helpful to keep up with old coworkers and such.