FYI,
Picked one up at my local Ace store but it seems that they are mostly available in Europe. (Note the above link is Makita, UK; couldn't find it on USA Makita site).
It's technically an impact driver, but I use it to drive and remove difficult philips screws. 1/4" hex bit quick-release collar (lift up to unlock the bit).
It's quite nice, although 2000rpm (single-speed, not dual) is a bit fast to just drive in wall switch and receptacle screws.
7.2v, 1Ah Li-Ion batteries about the size of a medium-size bar of soap.
And the one I got is white! Well, kind of light gray, but not the Makita blue-green.
Soft case with 2 batteries, charger, bits, 1/8"twist drill.
US$100.