Ok, its done...private messaging has been turned back on...BUT...the registered users group does not have access to it.

As soon as the site runs its regularly scheduled maintenance routines (every hour) it should make a mass promotion...promoting all users with more than 5 posts to the Guild Members group, and allowing private messages again.

I'll make a post here when I see for sure that that has happened.

All members of additional groups (such as industry pros and CLs and whatnot...should already have their private messaging system back...but I'm not sure)