You should see the mess of cables, chargers, and charging cables that clutter my backpack every day. Moving from car to car and home to work while testing a variety of devices means that iPod sync cables, USB cables, Mini- and Micro-USB cables for mobile phones and GPS devices, 12-volt car chargers, and 110-volt wall chargers eat up a good deal of my bag space. For me, this is why Scosche's PowerFuze charger system looks interesting. This charging solution should let you replace a number of cables and chargers for an all-in-one approach. It's a car charger and a wall charger. Ideally, it's the best of both worlds.
The PowerFuze system crams a few different charging configurations into one package. When you're at home, it is a two-port "Made for iPod" and "Works with iPhone" certified USB AC charger that plugs into a 110-volt wall outlet. When you're on the road, a 12-volt USB charger pulls out to take advantage of your vehicle's DC power port. If you have 12-volt DC car accessories that you want to use indoors, the vacant 12-volt port will work as a power inverter to accommodate them. With 1 amp of current split between the two channels, you shouldn't expect to power a 12-volt air compressor on the PowerFuze, but there's more than enough overhead for most portable devices.
Then again, most users only have one car, so they won't really see the point of carrying around the 12-volt charger. That little bugger will probably find itself perma-lodged into your car's DC power port after the first week--when you get sick of bringing it into the house every day. That being said, I still think it's nice to be able to pick up both chargers for one reasonable price and have the flexibility to use them together if you should decide to do so.
The PowerFuze and the PowerFuze Pro (with an included iPod sync cable) sell for $34.99 and $44.99 respectively. If you only need a car charger, look for the PowerPlug and PowerPlug Pro with sync cable for $19.99 and $29.99, respectively. Check out Scosche.com for more details on this cool little stocking stuffer.