Below is a poster I put together describing the feasibility of rapidly charging EVs.
There are three main things to consider: (1) Cell chemistry (2) Power source (3) Chargers and (4) Battery pack design.
The good news is that it's all totally feasible - though research & development is obviously required! A123 has already developed the cells necessary.
Remember that drivers would not rapid recharge all of the time. Most of the time they would charge EVs for the lowest cost - slowly - over night in their garage. But in the event they need the extra range, rapid charging should be an option.
Included is a chart Shane and I (with help from professional electrical engineer Dave Rodgers) put together. It shows how you could rapid recharge a motorcycle at home, while a sedan would require higher power - which is already available in most industrial buildings (think Home Depot, Best Buy, etc.).
Thus our vision is that the rapid recharge stations would not be at home - but rather at fueling stations like Hope Depot, Shell Gas Stations, etc. This is totally feasible - and the power already exists in many of these buildings.
(click to enlarge)