I've been reading the different forum posts about packages being opened for inspection.  I know that the PO has to either include a note saying it was opened and inspected or stamped saying so.  Is there a way for either PBS or the receiver to notify the sender that the package was inspected?  This is just plain curiousity (sp?) on my part as I've not received an inspected package.

you could PM the sender

No, the system is not set up for those kinds of notifications. You could PM the receiver and ask them to let you know if it is inspected, but there's no way of knowing if they will. PBS is not notified when the packages are inspected. 

I don't think books sent in paper wrappers or padded envelopes get inspected very often unless they are being sent from Wisconsin. It's usually pretty obvious that there is a book inside. 

I had a member PM me once to let me know that a book I had sent arrived with a note saying that it had been inspected.  Yes, I am from Wisconsin :)