Getting the reviews page URL for a product in the product page sidebar

Adding the Review url in your customization page
For example
Since it is a new block that is needed, you need new template file.

Add:
app/design/frontend/base/default/template/review/sidebar.phtml

Enter into it something like:
 <div class="block block-reviews">
    <div class="block-title">
        <strong><span>Reviews</span></strong>
    </div>
    <div class="block-content">
    <p><a href="<?php echo $this->getNewReview($this->getProductId()) ?>">NewReview</a></p>
    </div>
</div>