Different users have access to different functions of the site. While anyone can do most things on the site, including reading and editing, rollbacks can automatically revert an edit with the click of a button.
These rollbacks log on frequently to edit and/or browse the wiki. They are the best users to contact.
These rollbacks do not log on all the time, though are still relatively frequent.
These rollbacks are currently away (such as on vacation, etc.), but will return shortly. It's unlikely they will edit or respond to messages, except for rare occasions.
For whatever reason, these rollbacks aren't able to log on to the wiki for an extended period of time. Their inactivity has been excused due to unfortunate circumstances.
Unfortunately, these rollbacks have stepped back from their respective roles on the wiki. They will retain their respective privileges so long as they desire, and are welcome to resume involvement in the future if they so choose. We thank them for their service to our community.