Car charging accessories are common but rarely sexy; most companies these days seem to be competing to make last year's chargers smaller rather than adding major new features. Kensington's new USB Car Charger for iPhone and iPod ($20) is a prime example, packaging a black USB-to-Dock Connector cable with a very small charging bulb -- it's only a little taller than the third-generation iPod shuffle. Merely for charging rather than audio-out, it's the…
