Make a copy /desktopmodules/activesocial/config/profileviewstab.config to /portals/portalid/activesocial. This will make sure your changes don't get overwritten with each upgrade.
Open your copy of profileviewstab.config and insert the snippet below to create a new tab.
Save the file and you should see the new tab when you go back to your profile.
<tab controlKey="links" text="[RESX:Links]" isPostBack="true" hidden="false" permissions="" loadmethod="2">
<content>
<![CDATA[<active:JournalList id="lstJournalLinks" UseStaticTemplate="True" JournalTypeId="7" runat="server" JournalMode="0">
<headertemplate>
<ul class="asjournallist">
</headertemplate>
<itemstemplate>
<li><h2>[AS:JOURNALINFO:DATECREATED]</h2></li>
<li class="asjournalrow" style="position:relative;">
<div style="float:right;position:absolute;top:0px;right:0px;">[AS:CONTROL:JOURNALACTIONS]</div>
[AS:JOURNALITEM:TEMPLATE]
<table class="asjournalrowitem">
<tr>
<td>[AS:JOURNALINFO:JOURNALAUTHORPICTURE]</td>
<td class="asjournalcell">[AS:JOURNALINFO:AUTHORNAMELINK]
<table>
<tr>
<td>[AS:JOURNALINFO:IMAGE]</td><td>[AS:JOURNALINFO:SUBJECT]<br />[AS:JOURNALINFO:SUMMARY]</td></tr></table>
<br /><div class="asjournalbtm">[AS:JOURNALINFO:ICON] [AS:JOURNALINFO:TIMEFRAME] [AS:JOURNAL:LINKOPTIONS]
[AS:CONTROL:COMMENTLINK] <a href="[AS:JOURNALINFO:DI:URL]">[RESX:More]</a></div>
</td>
</tr>
<tr>
<td></td><td style="width:100%;">[AS:CONTROL:COMMENT]</td></tr></table>
[/AS:JOURNALITEM:TEMPLATE]
</li>
</itemstemplate>
<noresultstemplate>
<li>[RESX:Journal:NoItems]</li>
</noresultstemplate>
<footertemplate>
</ul>
<div align="right">[AS:CONTROL:PAGER]</div>
</footertemplate>
</active:JournalList>]]>
</content>
</tab>