I recently started working for a company that is badly in need of a new shopping cart solution. I think FOSS has something to offer for our $100 million/year enterprise, but I need to convince others. I have looked into some Java-based open source carts, like Apache OFBiz, but I'm somewhat new to e-commerce having spent much of my career in middleware and back-end development. I would appreciate some input from experienced members of PLUG about what shopping cart to recommend and how to sell my executives on FOSS. We need a stable and feature-rich cart that can be heavily customized to fit our environment.