My i hits the highway regularly, but yeah, improved aero would be of marginal benefit. I'm interested in the AWD for the performance benefit of adding a parallel electric drivetrain and not meddling with the original drive. A 6" series motor up front with 1000 amps from a suitcase pack could turn the i into a pocket rocket, while retaining regen (or use an AC20 drive and dial up the front regen). Pull the extra pack on Monday morning, and commute all week in civility with a fairly small range penalty from the idle front axle...
DIY DCQC is another goal- put in 330VDC thru an Anderson 350 in the empty CHAdeMO port, and get yourself up to 80% at home in a fraction of the time and cost.
Or there's the warranty-proof method of putting some powered rollers in your garage and letting the car recharge via regen. Imagine tying the car down on a dyno and then regenning at full bore until the car is full. If max regen is 104A at 330V, per JoeS' measurement, an even 34 kW of forced regen would refill the car to 80% in oh, 23 MINUTES.viewtopic.php?f=10&t=288
I foresee driving to the top of steep pass in the near future in order to test this theory! Certainly safer than forced regen at the end of a tow rope, like these crazy dutchmen: http://jalopnik.com/5805407/crazy-geniu ... ckup-truck