This plugin will import your WP-Ecommerce shop to Facebook in a couple of minutes, with no development or design skills required.
Download the zip file and save it locally
Log in to your WordPress blog administration screen.
Click on 'Plugins' and then on 'Add New' (left menu)
Click on the 'Upload' link, choose 'storeya-products-feed-e-c.zip' file and click on the 'Install' now button.
Click on 'Activate Plugin' link
If you are not logged in, please click on the "Get started now - Connect with Facebook" button.
Type in your Store's URL and click on the "Continue" button and then on the "Activate" button.
Connect your store to your Facebook fan page.
Once you are happy with your Facebook store's customization, have it published!