Bob, do this.
Go to your forumhome template of the skin you want to change this from.
Find:
Code:
<vb:each from="activeusers" value="loggedin">
<li>{vb:stylevar dirmark}<a class="username" href="{vb:link member, {vb:raw loggedin}}">{vb:raw loggedin.musername}</a>{vb:raw loggedin.invisiblemark}{vb:raw loggedin.buddymark}{vb:raw loggedin.comma}</li>
</vb:each>
{vb:raw template_hook.V_name_list}
</ol>
</vb:if>
I highlighted the "musername" in red.
Change it to username to remove the avatars from members names in the WGO area.
I tested it on the same skin you use - and I am going to bet that was the same code we shared.
Anyway - good luck!