– Comments etc. are only possible for registered users
Done in the admin area – native to WP.
Special Posts are only avaiable to a special group of users (they
should not have any rights beside commenting, e.g. not able to
write own posts). Would be ok if they have to belong to a special
No problem – this can even be enhanced with the Role Manager Plugin: http://redalt.com/wiki/Role+Manager
Account validation (register should be validated by email)
Setup in admin area – native to WP
I found a couple of plugins, especially for the special posts
stuff, but some of them seem to be not maintained anymore, others
“leak” informations like postcount etc. which i definitivly do not
want. So if anyone has some recommendations, i’d like to hear from
I run over 50 plugins on my site – see if you like any of them: http://www.comeuphither.com/blog/plugins/
Also, search the codex – there is a reliable plugin for almost anything you can think of.