I'm sure I'm not the first to put this on the table, but I was thinking we need to take that Penpersonship to the next level, with an air-mail system. mailboxes have been brought up multiple times. it would be very nice if we could write letters (this could be another skill on the tree) and have them delivered to a recipient's mailbox.
Also, could we have the option to write Notes anonymously? this hasn't been an issue for me, but it just occurred to me there might be a circumstance in which it would be convenient.