You will need to find the code where it appears in your listing and change it for something else. This isn't too hard for me, since mine went in via a default template, so I can change:
Code:
<p>Thanks! <img border="0" title="Laughing" alt=":o)" mce_src="http://uk.nine.ebid.net/editor/tinymce/jscripts/tiny_mce/plugins/emotions/images/smiley-laughing.gif" src="http://uk.nine.ebid.net/editor/tinymce/jscripts/tiny_mce/plugins/emotions/images/smiley-laughing.gif" /></p>
for
for example.
You'll need to do that for each smiley you've used, in each context you've used it.
Now you see why I hope ebid will do it for you!