Ok I think I'm there
Here is a link to the Github Repo:
https://github.com/FuzzyBearBTC/terracoin-wp-e-commerceYou will need:
1) WordPress installed on your server.
2) wp E-Commerce plugin installed in wordpress
3) the terracoin.php file needs to be dropped in the 'wordpress/wp-content/plugins/wpsc-merchants' directory
4) an instance of terracoind running on the server
5) follow the setup instructions in the readme file from github for store settings to select terracoin as payment
I have set up a test wordpress site with the hosting company I use and am waiting to see if they can run an instance of terracoind for me on their server, but i have checked all the functionality and from the merchants side you can specify the port your terracoind is running on , so should be able to connect to the client and that is all that is needed to generate the addresses for payout from the shopping cart.
Check out my example site so far
http://trc.ltcmusic.com/If anyone wants to test if they are running a server with terracoind on it then please do and the first to post a link here to show it working will receive 200TRC