I thought AC propulsion's liquid fuel engine trailer was a neat idea.
Why carry around an engine when you don't need it most of the time.
http://www.evnut.com/rav_longranger.htm
It'd probably be even better if something like that was available and we could drop the size of the battery packs some.
Though if the new rapid recharge battery chemistries work out maybe it wont matter.
@alienghic @steve The problem in the US is the awful state of the charging infrastructure. Doesn’t matter what your car can do if you can’t find a charger to give you the juice.