ToolBox writes:  

DB-based Feedback adds-on hack by NukeKorea Dev. Network:
In general, administrators and sub-administrators need to stack feedbacks to DB table. In some situation, admininistrators do not want to send and get email-based feedback for some local email-service (sendmail service) malfunctionings.
DB-based feedback hack enables you to stack feedbacks to your DB and provides you with alternative but smart ways to save the feedback from your site visitors and users.
Features:

• Feedback lists in waiting contents block
• turn on/off DB-based feedback and/or sending email
• Change LOG in version 1.1.0 - 1) sub-administrators access; 2)security patch 2.3.1 compliant, 3)new installation doc.
  
  Extra Info:
  
• Download (registration required)
• Indepth Screenshots
• Support Forum