Not sure if that was covered here already but I would love to have something like "Leaf to Home" for my Model S: Nissan Launches Leaf To Home Electric Car Power System Anything on that front?
Tesla advices against charge cycling your precious car battery to power your home. Instead, there are dedicated battery units for home storage. Read more in this thread: Solar Power and Battery Backup: Tesla and SolarCity's Dream Home Due to different cell chemistry, the Tesla battery pack doesn't like being cycled as well as the LEAF's pack.
No thanks. That is what the Tri-fuel Genset is for. Besides, didn't I see something in the roadster's warranty that says not to use the car as a stationary power source. I suspect the same will be true of the Model S.