... J1772 relies on an onboard charger in all applications. Its just that with cars, it's not much of a compromise to install a larger, level 2 charger.
I did not realize that. I thought that the electronics for the charger were in the head units that came with L1 and L2 J1772 cords. I guess that is just the circuit safety electronics in there. There definitely more room in a car for bulky charging hardware. Well charge times weren't that bad on the bikes anyways...
Yep, the current J1772 stations are essentially 110/220V AC plugs with some safety features and interlocks built in. http://en.wikipedia.org/wiki/SAE_J1772
If you think of the economics of a J1772 station, that allows someone to charge you money for their electricity, it takes a lot of charging to get a return on their investment. They could have just installed a freely available 220V plug (like a dryer plug) with a J1172 handle attached to it, and not charged for their electricity, and probably loose less money than it would have cost to install an official J1772 station, but had more happy customers in their shops buying their goods / services.
The new J1772 Combo connector has both AC power, but DC Charging as well, http://ev.sae.org/article/11005 . There are a few companies supporting this new SAE plug, but from what I remember, none of those companies actually have any plug in vehicles yet.
The Tesla Supercharger is a DC Charger, not just a plug, but it is different than Chademo. Tesla wanted more power than the Chademo standard offered, so they are doing their own thing.
-ryan