Yan Bezugliy at ProBargainHunter.com created a Shopzilla Wordpress Plugin that makes price comparison integration within a blog post insanely easy. Users just need to provide their own Publisher ID and API key to use it (those can be attained by registering for the Shopzilla Publisher Program).

Here’s an example of the plugin in action, comparing the prices on Robert Fagles’ translation of Virgil’s Aeneid: