You may find the realname module useful, in combination with some of the others already discussed.
http://drupal.org/project/realname
Luke
On Fri, 31 Jul 2009, Ivan Sergio Borgonovo wrote:
Hi all, I've to move users from a legacy system to D5.
In the legacy system the user name for login was the email.
Users will produce some public content.
In many places drupal uses the user.name to refer to users but I can't of course use users' emails to refer to users.
I can't even force the users to change the way they login. So they have to continue to be able to login with email, password.
One way would be to automatically fill name with something auto-generated during import and change the login process (looking for some clean idea that won't involve changing core, form_alter?).
Any other suggestion?