Facebook was incredibly popular, and had a lot of buzz even when you could only register if you had an email at a college they'd added by hand. So Facebook isn'

Facebook was incredibly popular, and had a lot of buzz even when you could only register if you had an email at a college they'd added by hand. So Facebook isn't popular just because everyone's on there. Of course, that helps. One could argue that its strength in that time was having everyone at your college on Facebook.