I definitely agree with this. I don't think anyone has yet figured out the X factor that has got evite all the traction. Maybe evite didn't even have an X facto

I definitely agree with this. I don't think anyone has yet figured out the X factor that has got evite all the traction. Maybe evite didn't even have an X factor (just luck and timing), but, certainly, any new players in the field need to have an edge somehow to succeed.