I had heard that Tony Williams was building a CHAdeMO charger for the RAV4EV (which uses something like a 50-ish kWh Model S battery pack). From watching this clip, it sounds like it's adaptable to other cars. I'm not really interested in charging my Roadster with CHAdeMO (or supercharging it) because I don't care to drive my Roadster for long distances. But, it seems like this might be a reasonable intermediate solution between 40A public charging and supercharging.
The EV Show - January 2015 - EV West - YouTube
The EV Show - January 2015 - EV West - YouTube