There is a new shipping module available in the Down Loads area - ZipShip. This is based on and works very similiar to the existing Zones module that comes standard with Zen-Cart 1.3.7 - You can create shipping zones based on Zip Codes for either weight/price or Items, just as in the Zones module.
This has been tested only on 1.3.7, but should work on most Zen-Cart versions. Just as with any module - back up before installing and at your own risk.
I created this for a customer that also has a brick and mortar store. She wanted to offer free and flat fee shipping to the communities within her store's immediate area. By using this module I was able to setup free shipping for a group of zip codes for Order Total over $50.00 and a flat $5.00 for those under $50.
Hopefully others might need this or be able to use is to create your own zip code shipping modules.
Ruth



