It looks like Axeze has released a keyless entry product, which focuses on security and redundancy. It also supports an I/O board, and can trigger other equipment based on certain events (i.e. door was left open), so it should be pretty easy to integrate with any Home Automation system. It uses a RS485 network as infrastructure, so it's pretty easy to expand your system in the future. This system seems to have a lot of potential, check out the full article on the HomeToys site or visit the manufacture site for more information.
HomeToys.com article
Axeze site
HomeToys.com article
Axeze site