[grey_goose]

Yeah, Template mod.

Find:

<a href="showthread.php?$session[sessionurl]p=$thread[lastpostid]$thread[highlight]#post$thread[lastpostid]"><img class="inlineimg" src="$stylevar[imgdir_button]/lastpost.gif" alt="$vbphrase[go_to_last_post]" border="0" /></a>
        </div>
</td>

After, that, add:

<td>
<div style="background: url(images/misc/unknown.gif) no-repeat center; width: 40px;  border: 0px;" >
<a href="member.php?$session[sessionurl]u=$thread[postuserid]"><img src="image.php?u=$thread[postuserid]&type=thumb" width="39" height="39" border=0 /></a>
</div> 
    </td>

Then it'll display an avatar thumbnail after the last poster's info.

edit: Hmmmmm but then the (thead) header is off... needs a bit of cleaning up.