I have two suggestions...

One is, I really wish there were a mailing system where you can send a message or even items to your friends even if they are offline.

My second suggestion/request is to add a chat screen while we are on the map. I get messages from friends sometimes when I'm on my map screen, and if they say more than one thing and I can't view the entire chat at once unless i go into town. Also its bothersome to have to go into the friend screen each time to message someone if I don't click reply in time, or accidentally close the notification...

But adding a chat option while on the map screen would fix all this!! Please consider!!