I've looked at this before too.... from one of my previous ecommerce setups(not to mention any names) the store admin could add notes to the order, click update and the customer would be sent the message to customer... this is really handy when a product is short or you want to communicate any message to the customer about their order. I know its just as easy to copy and paste their email address into a mail client and do the same.. BUT... this way the notes and communication to the customer are stored right there on the order for future reference. Maybe someday we'll get there!
