This feature is so important for 2 reasons.
1.- Personal Welcome Message (user name mentioned)
2.- New users are invited to be part of the community with the most important features.
Like any new member, after you register you are somewhat lost and do not know where to start. Also, if there is no welcome message (mentioning your name) it takes more time to the new member feel in community.
I wish to have this feature in Ning 3.