Numba1goalie, the iTripnano definitely looks better than the TransPod, plus at half the price. Downside, the iTripnano runs off the iPodnano battery and it does not appear to have a means to hold it on the dash or somewhere else.

...or are you using the iTrip Auto? Same issue with leaving the iPod to float about somewhere attached to the electric power. Curious to hear how you secure your iPod when driving.
http://www.griffintechnology.com/