If for some reason you have list of products skus, and for each you need to fetch out it's name,
you will better not use the old way of
$pname = Mage::getSingleton("catalog/product")->load(Mage::getSingleton("catalog/product")->getIdBySku($productSku))->getName();

because it will slow up dramatically your site.
Better use the following piece of code:

<?php

$productSku = 'sku1';

$pname = Mage::getSingleton("catalog/product")
	    		->getCollection()
	    		->addFieldToFilter('sku', $newpsku)
	    		->addAttributeToSelect('name')
	    		->load()
	    		->getFirstItem()
	    		->getName();