One common thing that we also do is provide a way for our clients to simply email the database and when we read the subject we know to perform some specific action and maybe log the email along with the attachment into a log table.
This provides a great connivence to our clients so they don't have to oepn up the database to simple attach an email. They can simply email the database directly.
It would be great if we could in some way have a native way to do this and then have some rules or actions that can be performed when the email is received.
And maybe this goes along with the notifications suggestion I submitted.