We just released it. Still working on getting a demo link up though.
http://www.bcsengineering.com/store/customizable-product-packaging-bundle-mod-for-x-cart.html?utm_source=x...mpaign=ft71176
It's pretty awesome and the interface in the admin as well as the customer side is very slick. It's also very highly configurable. Let us know if you have any questions on it.
Thanks,
Carrie