Quick code addition to display the product SKU in the shopping cart in Magento.

Copy the file “default.phtml” from here: “app/design/frontend/default/default/template/checkout/cart/item/” to your local template directory.

Something like “app/design/frontend/default/”your_template”/template/checkout/cart/item/”

Add the following under the product title:

        SKU: <?php echo $_item->getSku() ?>  

Finished:

<h4 class="title"><a href="<?php echo $this->getProductUrl() ?>"><?php echo $this->getProductName() ?> </a></h4>
        SKU: <?php echo $_item->getSku() ?>