That site is just a placeholder for what will be the information portal for the project in the future. I linked to it since it contains some more information about the project, but the server which runs the API is a completely different one. That is why you won't find any product database there at the moment.

Actually there is no interface to the database right now other than the plugin (and an admin interface). I'll do some work soon to make it more accessible both from the plugin and the web.

About the lookup database, I know that there is one at http://www.upcdatabase.com/, but it doesn't seem to give that much information but what you already can see on the package. I don't know how interesting it is to see this on your phone as well? I think it would be more interesting with plugins that connects the barcode information to nutrition facts, manufacturer, country etc, but I don't know of any current open databases with this information?

Hahahaha!