Magento: Get Product by SKU
Here is a quick code to get product information with SKU value.
Get product information by sku
$sku = "microsoftnatural";
$product = Mage::getModel('catalog/product')
->loadByAttribute('sku', $sku);
echo "<pre>";
print_r($product->getData());
exit;
Get product id by sku
$productIdBySku = Mage::getModel('catalog/product')
->getIdBySku('microsoftnatural');
echo $productIdBySku;
Hope it helps. Thanks.