Thanks wabadie for confirming it with ios 5.0.1!
I always wanted a way to update music or videos to my truck without having to reburn a disc, or having to get the device out of the truck everytime I want to add a song or so. This now makes it soo much more convenient, especially at those times where you just heard something cool and want to listen to it when your in the vehicle, so I just add it to itunes and press sync and its there!