I am informed that there are a minimum of smileys available on this site, and there is a reason: this is a forum that encourages both reading and creative thought expressed verbally. Smileys are shortcuts (after a fashion) that short-circuit the communication process. In moderation they can be fun, but I understand not multiplying them excessively. (One of the reasons this thread was started was to try to decipher what certain smileys mean, and the variety of comments shows that smileys can be easily misunderstood or used in various contexts to mean different things.)
You
could petition the Wight to add these new smileys, but I don't expect he'll receive them gladly. Estelyn is a bit of an exception, deserving of the honor. And the new smiley can be used in various contexts, but the one that occurs to me is sort of an "aw shucks, you mean li'l ol' me?"