I just made a lullaby CD for Corbin to play in the car when he gets tired and grumpy. Songs include:
Bleed It Out : by Linkin Park
Headstrong : by Trapt
Savior : by Rise Against
You're Gonna Go Far, Kid : by The Offspring
Teenagers : by My Chemical Romance
And in case you were wondering, yes, it does work. Less the normal margin of error when you're dealing with babies and little kids, playing this kind of music (as loud as possible) almost always calms him down and puts him to sleep. I also just got a new rear-view mirror for watching him in his carseat while I'm driving, and today I watched him go from mid-cry, to thoughtful, to falling soundly asleep in the middle of "No More Sorrow." It still makes me laugh, and I've known this for a few months now.
6 month update is forthcoming, but I haven't even done the pictures yet, and I'm working this weekend. So it will be a while.