I ordered mine back in June and finally received it this past Monday! It works well (better than the Belkin Tune Cast that I purchased). One problem that I keep having is after I tune in a station, I can't get the iPod back into random music mode. It just keeps changing stations on me .
Anyway, it sure looks better and doesn't require batteries.
I just went to the Apple Store on Friday to browse, and I was looking at the 10% music accessories, and there was a 3G iTrip, so I picked it up. I have a iRock, and the iTrip is so much better it isn't even funny.