An e-mail I received yesterday:

Hi David 
I do not know if you are the correct David I am trying to contact. If you went to The Settlers High School in South Africa, matriculated in 1982, then you must be my long lost friend I have been trying to locate. If so please e-mail me at the above address.

Yes, I am that David. I have made contact with six ex-schoolmates in the last year alone, a couple of whom have tracked me down through this site. There may be something in the fact that it's approaching [gulp] twenty years since I left school.