Take a look @ /app/design/frontend/default/default/layout/review.xml
<customer_account>
<!-- Mage_Review -->
<reference name="customer_account_navigation">
<action method="addLink" translate="label" module="review"><name>reviews</name><path>review/customer</path><label>My Product Reviews</label></action>
</reference>
</customer_account>
See Magento - How to add/remove links on my account navigation?