I think it would be great to allow prospective to 'register' on the site (like I did for the support forum) and choose their own user name and password and enter their email address. I don't really want to manually create users login and passwords for the amount of members likely to use this blog and have to send them out by email. I would like to limit comments to registered users rather then everyone as at present so this would mean all members would need to have a login and password.
From those registered, the administrator(s) could then assign additional blog 'rights'. An ability for registered user to reset or be sent their password would be cool too!