Here are some iTrip tips. I was reading through the comments in the Griffin iTrip review (http://www.ipodlounge.com/reviews_more.php?id=439_0_6_0_M) and there were some misconceptions.

The firewire tab that protects the firewire port does not have to be cut or filed off. It will simply pop off if pulled with enough force and can easily be popped back in.
You can charge your iPod while using the iTrip, by lifting and turning the iTrip so it sits in perpendicular with the iPod and the rear notch of the iTrip facing towards the firewire port. The notch allows for the firewire cable to be plugged in.
The U.S. FM Frequency band is odd numbers on the tenth decimal position ranging from 87.7~107.9.
For Windows users that don't use MusicMatch, the playlist and frequency files with the correct ID tags are avaliable here (http://www.bonecloset.com/iTripUSA.zip).