I just saw that there was a similar request in the past and you commented that you didn't see it as a high priority. In our environment, timely knowledge of events is huge. When you include automated task initiation and completion into the mix, it makes it very difficult to monitor. Knowing not only when there is a failure but also success is very important and I feel a huge feature. Moreover, I see the feature relatively easy to add. I would envision nothing more complicated than the option to specify the SMTP server, port, and recipients in the configuration section...and maybe a "Send notification by default" type option. On the initiate copy form, a checkbox for success and a checkbox for failture notification would be ample.
Just my thoughts. In either case, your product is awesome and it is your choice. I appreciate the consideration if nothing else.