Digg, del.icio.us etc
This post at Scoble’s site relates to my personal experience with college-aged people and their experience with facebook, digg, del.icio.us, newsvine etc.
College-aged people that I’ve talked to haven’t heard of the later, however have at least heard of facebook, and more than likely have profiles/pages on the site. I hadn’t heard of it until just the other day.