Everyone knows XPT is the best discussion board not because of all the perverted shit talking, but the best and easiest use of smileys/instant Greamlins on a web board around.

How are new ones added? A survey process? Voting?

A couple I'd use constantly:
-A Double Penetration one
-A skull fucking one
-A nerd one...or one of a Star Wars Nerd Smiley in costume