Well, with some misgivings, I finally created a Facebook account for myself. As my wife already had one, I had to set up a new email account first. I used gmail: firstname.lastname@example.org. I had been thinking of setting up a separate one to our standard ntl address, as that can only be accessed from our own computer. How the internet complicates our lives, though, with all these details to remember, not to mention those dreaded passwords.
Anyway, early days yet, but my Facebook account seems to be working okay so far, though just how much I'll use it I don't know.