I think I'm almost done. A few things need to be changed for commercial purposes.
The Guest Log needs to have buttons for responding to a Log entry. It will work like Email.

The ad creator will then have a simular button to respond to that person, in their log.
Clicking on an ad's heading needs to create an entry in the Ad creators log, and not go to email.
Also, I need to create a live, working site. I'll probably use LVDarlings.com to that in.