Many of the smilies people use (Trep especially) are not AG smilies at all, but images from somewhere else.
Of the ones that were removed (discussed in the thread Doug linked to), some still work if you type in the tags for them...
etc. [left to right, they are : rolleyes : , : confused : , * D , : sad : , and : ( ... just leave out the spaces.]
:eek: doesn't work anymore, though, and that makes me very sad.