Thanks, I just found that Tesla has an adapter for it's cars to connect to SAE J17772 plugs: http://my.teslamotors.com/roadster/charging/j1772-mobile-con... . Too bad Tesla didn't standardise on that format so that other cars can benefit from their chargers.
You're confusing the issue. The J1772 standard for Level 1 (120V) and Level 2 (240V) charging is standard, and all electric cars use it. Tesla provides a J1772 adapter with every car they sell for at home and public charging.
The non-standard is the Level 4 direct DC charging, which has multiple competing standards. Tesla developed their own because there wasn't a standard when they launched Model S, and they wanted a system that allowed for free DC charging for their cars.
