Who says you can't take it with you! Arkon mounts let your sony PSP become your cars portable entertainment center. I can power my PSP and run the audio through the car radio. Sooo sweet its www.arkon.com . Check it out!
For a moment there I thought you were going to say you could play your PSP while driving. Now THAT would be a BAD idea. =)
Haha! The first time I saw this thread thats what I thought you meant... You know, stopped at a red light, what else is there to do? Just WHIP OUT YOUR PSP! Great idea.