kdog,
"Imagine a road system where people are cruising around at 50-100kph in little e-velo's sipping 100w or something crazy small like that."
Not quite that efficient, but pretty damn good. You can pull CdA, and Cr for the White Hawk streamliner on
http://www.kreuzotter.de/english/espeed.htm
I think this is where Justin got values for his motor simulator.
http://www.ebikes.ca/tools/simulator.html
Playing around with some numbers, I think a more realistic streamliner, for commuters, with electric drive, practical suspension/tires/brakes will be four times the weight, and have quite a bit more drag. Even then, 500-1000 watts, and 2.5-3 kWh will get you 35-55 mph for 100-150 miles, an order of magnitude better than any electric car.