The TuneFlex has a built-in line-out jack for a cable to your in-car stereo, and a pass-through dock connector that lets you connect accessories to the iPod, like Griffin's iTrip FM transmitter or ...

The device can power a dead 3G iPod, but it can’t charge it, so Ian is looking for some input from the community. Some have already suggested using FETs with a lower turn on voltage.

Jason sent me his solar ipod charger how-to. The regulator may not be neccesary – but there are so many models, I don’t know if the new Nano’s hold up to the old power input standard.