How about adding "Notifications" option that would allow the user to setup/enter SMTP settings to notify an email recipient/s of anything new added automatically. Perhaps pulling the data or book names from the Latest Additions data?
In other words, anything new added since the last scan would be listed in an email and sent to a recipient list. The recipient would receive an email that would perhaps say something like this:
Message from Jason's Ubooquity Server. The Following Books Were Recently Added:
The Amazing Spider-Man #1
Click here to view these books....
This would be an awesome feature to help keep users up-to-date.
Customer support service by UserEcho