This is something else I did (integration)
Edit your MEMBERINFO Template
Find
PHP Code:
<if condition="$userinfo['showyahoo']">
<tr>
<td>$userinfo[yahooicon]</td>
<td><a href="#" dir="ltr" onclick="imwindow('yahoo', '$userinfo[userid]', 400, 200); return false;">$userinfo[yahoo]</a></td>
</tr>
</if>
</if>
</table>
</fieldset>
</if>
or if you have the skype/gt/etc. mods in place
Find:
PHP Code:
<tr>
<td>$userinfo[skypeicon]</td>
<td><a href="#" onclick="skypewindow('$userinfo[userid]', 400, 200); return false;">$userinfo[skype]</a></td>
</tr>
</if>
</if>
</table>
</fieldset>
</if>
Add, after:
PHP Code:
<fieldset class="fieldset">
<legend>$vbphrase[miscellaneous]</legend>
<table cellpadding="0" cellspacing="$stylevar[formspacer]" border="0">
<if condition="$post['fieldx']"><a href="member.php?&do=memberauctions&userid=$post[userid]"><img src="$stylevar[imgdir_misc]/ebay.gif" alt="$post[username]'s Ebay Auctions" border="0" /></a>
</if>
</table>
</fieldset>
Don't forget to replace x with your field number.
Also note that I chose to put this under Contact Info (I do this as I am going to have other things with ebay - for references) - You may want to choose to put this under Addtional Information.