Baron, The site Covers.com has a list of animated smileys that are a riot and would probably do well here. Check them out.
Just make a link with the img tag to the smiley. ET doesn't have to add any special features for animated smileys.
<a href=http://www.getsmileyface.com><img src=http://www.getsmileyface.com/new/animations/9.gif border=0><br><font face=arial size=1>Smiley Face</font></a> VERY COOL,, Thanks
<a href=http://www.getsmileyface.com><img src=http://www.getsmileyface.com/sm/mad/101.gif border=0><br><font face=arial size=1>Smiley Face</font></a>