I can't figure it out. Nearly every tech-savvy European I've met in the last six months knows of and most of them use skype. Mention this form of social/business networking in the U.S. and you'd swear a rat just ran across the floor. I don't get it... Do you?
I don't know what the people I call are using but I don't use a headset - a headset annoys me - I don't even use my Bluetooth headset and if you know my history with Bluetooth, you will find that hilarious.