Ported from osC by me :)
This contribution connects your store to the Postcode lookup services of Postcodesite.com. This service has the following benefits, and features for your shop;

* Decreased cart abandonment by your customers.
* Faster checkout process.
* Cleaner address accuracy.
* Improved accuracy on delivered items.
* Smart, easy to use interface built directly into your site, no pop ups, or site redirects required.

Supports Zen 1.3.9
Demo in the readme.
Link to Contribution: Coming Soon.