Also, I know this probably isn't going to happen because it's hard and a lot of people probably wouldn't use it...
But it'd be awesome if there was a mode where you could use talksprites as well during conversation.
So, you could set specific talksprites to some moods, or something, and each new message you sent you could change it. And each message in the chatlog would have a little faint dot beside them, which you'd click to see what the sprite was on at the time that message was sent.
It'd be like the alterniabound setup, but with one person's sprite on the left and one on the right. Which I guess would mean you'd have to be able to set 'right side'/'left side' versions of the sprites. Ah gad this is complicated, sorry. But if anyone wanted to take up the challenge, it'd make my life! xD