Creative COW just posted my review of Anton/Bauer's Tandem 150 "modular power system" ($995 list). Basically, it's a lightweight charger head and power supply that can power a camera system up to 75watts *AND* simultaneously charge a battery as fast as any other Anton/Bauer charger can manage.
PLUS, you can take the charger head alone (no power supply brick needed), and use a $195 cable to attach it to a car's cigarette lighter to charge a battery at full speed, or power your camera. And if you're out in the Great Outdoors, you can attach the charger head to Anton/Bauer's 60 watt solar panel ($1695), and charge a battery in 3.5 to 4 hours or so (weather dependent).
I needed a light-weight charger and was going to get the Tandem 70, which can only power a camera OR charge a battery, and doesn't have the car and solar options. But reviewing the 150 changed my mind, so I got the 150 instead. It makes battery charging too convenient to pass up.
You can read the full review here.