Put in features to customize your writing font, size, color, ect. Maybe be able to have something come up on the other person's screen when, say I, am typing. Maybe like "mjf910 is typing" but let us be able to personilize what it says/what it is (maybe like dog running across the bottom of the chat window, perhaps.) And maybe for the sound, make us be able to have a selection of noises to chose from.
Perhaps add a bar under the name bar that says " 'mjf910 is playin 'Papa's Freeziria' "