I have been working with the API on facilitating inbound letters.  We will have even more features once you have the ability to read the inbound letter and reply to it.  These are things I simply cant manage myself - I am receiving mail from over 155 orphans in the mailbox - the entire bottom of my coffee table is full of 50 lbs of orphan welcome packets, pastor letters, crayon drawings, translator letters, orphan moving receipts, name changes, relatives of orphans moving down the street, something is coming every 15 minutes now, so I cant possibly keep up with all this so it must be automated and I need your help.

Once we have a little more time, I will enable the ability to add pictures to your outbound letters.  In the mean time just write text letters as it is better to have something than nothing.