Mark on June 14, 2008 04:05 AM:
Ahh, the age-old # = pound, number, hash, octothorpe, sharp, etc debate.
I believe the definitive answer is "anything but pound". You Americans only call it pound because it's in the same place as the actual pound () key on the GB keyboard layout
Actually, the '#' symbol has appeared on our telephones long before computers became commonplace. In this context, it's always been called "pound".
Note, I still call it "pound" when referring to the button on a telephone, but I call the character itself a "hash symbol".