Some info on the Prius PHEV:
http://www.engadget.com/2010/10/18/prius-phev-preview-three-days-in-plug-in-paradise/
We'll get this out of the way early: the Prius PHEV is still very much a prototype, not available for sale and not destined for widespread availability for another year or so. Despite that, the car we tested is remarkably polished and certainly looks like something that rolled straight off a production line -- largely because it's mostly a fourth-generation Prius. Still, some extensive modification was required to carve out room for a considerably larger, considerably heavier (by some 300lbs) lithium-ion battery pack.
This pack receives the juice coming in through the plug on the front-left fender of the car, which comes with an adapter you can plug into a standard 110 or 220 outlet. At 110 it'll take three hours to top of the cells, half that at 220 and, while 440 volt charging is not supported yet, it's expected to be there by the car's release, and expected to take less than 45 minutes.
What do you get for that? Somewhere south of 14 miles worth of range operating on pure, sweet electricity -- assuming you can keep it under 62mph, at which speed the gasoline engine spins up to help things along. Floor it and that internal combustion engine will also spin up, but surprisingly that's not really necessary.
Thoughts:
1) Batteries are still a problem; energy density needs to increase before pure EVs are viable. Too big and too heavy. Not to mention ridiculously expensive.
2) Prius is on the 4th generation already. Let's give GM some slack here.
3) What was all that fuss about the gas engine cutting over once it reached 70mph?