Why doesn't the chatroom have any smiley? It can help us to transfer the emotions. I know that here isn't suitable for chatting but IMO having the smileys is a good idea.
Because we are serious people :) (look, an emoticon!)
Jokes aside, I don't really see it as a priority, and most of the people around here are probably more pleased with the plain text emoticons. Or at least this is my impression.