WordPress for iPhone Forums

broadcast

Limits who can read posts based on their user role. Also optionally emails notifications of new posts.
User roles can be given an alias name e.g. "Author" can be renamed "Full Member".
Option to include subscription checkbox on registration form. Otherwise option to automatically subscribe new users or not.
Users subscribe/unsubscribe on their profile page.
Capable of resending posts which have been edited.
No extra database tables.
Configurable hidden content messages.
Hides restricted content for RSS feeds.

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2. Developer Information