This module allows you to set a "timer" into content nodes. When it reaches zero, you can perform any type of action with the node, such as unpublishing it or sending an email to the author.
Features
Perform custom actions when the nodes expire
Granular permissions: let only some users to modify the node expiration date
Date field can use jQuery Date Popup widget, if Date module is installed with Date Popup enabled
This module moderates public posts from organic groups module. Moderated posts will be hidden from anonymous visitors. Moderation needs to be done by node administrators or another module.