Originally Posted by Defiler
I tried this the other day in my car and it worked.
I got a cheapie car charger with a USB port on it. Similar to this one: http://mobiledriven.stores.yahoo.net/usbcarchad.html
Then plugged in the USB charging cable and guess what? You can charge your Clip and play music at the same time.
In the Quick Start guide, it says:
"The battery can also be charged using an AC adapter or a car charger and you will be able to play your device while charging with one of the adapters."