EDIT: Of course this is essential to the business because if they release the FULL source code and steps to reproduce it, people could start their own site and probably overtake Ripple. Unlike this bitcoin is fully open.
Ripple isn't a site, it's a network. The Ripple.com website is just a convenience, and just like blockchain.info, you don't need it to use Ripple. In addition, and unlike blockchain.info, your wallet isn't actually hosted there. People can already start their own sites if they want to.
So the full source code of ripple.com is available? If so, great! I will try to copy and rename it and host it myself.