Let me apologize if anyone feel that I've jacked this thread, BUT I just want to let you all know about my experience with the USB feature of this device before you roll your ride in for test.
I have been using this with a USB stick for about three months since March. My honest opinion? This unit still need LOTS of work....at least for the USB portion of the device (I'm not an Ipod, Iphone or "Ianything" user/fan

).
Some of the problems I have are (at least with the USB feature of the device):
Startup: Sometime the unit doesn't startup, you gotta either turn off the radio, unplug the USB stick and plug it back in. There are times that neither of the method works and I play cd instead for awhile and the go back to it and it works again.
Resume Play: Anytime you turn of the radio, and go back it does not play from where you left off. It tends to remember the disc/folder that it chose to remember at initial use of the drive/stick. I try various usb stick and have no control/clue as to which disc it chose to remember.
Voulme: Another problem is the volume seems like 5 notches lower then playing the cd. I play the same song on cd and the volume settings that I was play the GROM almost blow my ear drum out.
I been work with their support guy (Alberto) for the problems from day one. He sent me the latest firmware upgrade and it seems to help the startup problem quite a bit, BUT still problem every now and then. They also point me to increase the volume thru a config file and it not help much as it distort the sound quality if you set it to the max.
So to sum up my three months of use of the USB feature. I'll say it's a 60% good.