I am pleased to announce nopCommerce Facebook Shop Tab
This plugins allows you to show your catalog on your Facebook fan page and reach out to Facebooks 1 billion users to increase your traffic and sales. No import/export needed, works directly from nopCommerce. Visitors can browse by Manufacturer, Category and even search your catalog. All from within Facebook.
Some people reported a non working demo page. This is caused by Facebook, sort of.
If you have turned on "Secure browsing" in Facebook everything will be accessed via https. Because I installed the demo plugin on a subdomain (demo.nopessentials.com) and only have SSL for http://www.nopessentials.com the connection times out.
In a normal setup (eg. installing on your main domain not a subdomain) where you have SSL protecting your shop Facebook secure browsing will cause no problems because the plugin is also installed into your secured shop and https will just work.
You can turn off secure browsing (temporary) here: https://www.facebook.com/settings?tab=security to see the demo