Good id, but...
For example I suppose it would be possible, if every webmaster agrees, to use the very same LDAP directory, which might be replicated for redundancy reasons, to check username+pw when an user tries to authenticate.
...I do not agree on the replication part. I think a new user shouldn't be replicated to the Central Authentication server. A new user should be created directly on this server. Because: What would you do when the user already exists, but had a different password or mail address? Not allow this user to be created? Change his/her password or mail address? Create a second user? According to me each community member should have 1 user with 1 password (name it account if you'd like). Maybe it would be nice to have the possibility to have 1 mail adress for each mailing list. Just for those who want to keep these mails strictly separated. --Yvon Breuer