I'm happy to add a handful of TTG-related smileys. (Maybe a Velocity Raptor?)
Robly raises a good point of not wanting things to get too cluttered -- if I recall, after I introduced t :He :Higgs icon t :Hings got a little toug

to read for a w :Hile

But that didn't really end up being a permanent thing, we use them a little more subtly now.
Before I go and do it, though, I'm interested to hear from other forum users about what they think.