Yes it is. Keeping in mind that most Magento systems are highly tuned, and this may not work for your specific installation, use the URLs in the form
http://commercebugdemo.pulsestorm.net/index.php/catalog/product/view/id/27 http://commercebugdemo.pulsestorm.net/index.php/catalog/product/view/id/[ID HERE]
If you are ever interested in learning more about the Magento page in stock, you can use the free Commerce Bug demo page to find your page, and use the Controller / Request tab to check the path information. (Disclaimer: I have a company that sells the Commerce Bug extension)
You can also disable URL rewriting in Magento, and Magento will generate "not so" URLs.
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