It seems that all of the cool head units are available in Europe and not here. A while ago, I was looking at Single DIN Navigation units for my car. I don't like the look of the ones that have the screen that pops out of the unit itself. There were only two available in the US. (The Harman Kardon TrafficPro and the Blaupunkt TravelPilot.)
Europe has a lot available. Here is a page from the gps warehouse that lists all of the single din navigation head units.
Also I saw the same thing when looking for a single din head unit that has bluetooth capability. The only one that I found was the Pioneer DEH-P70BT.
I wonder if these would work if I ordered it. I know that the AM tuning wouldn't work as it tune on 9 kHz intervals, instead of 10kHz intervals as that are used in the US. For the navigation units, it might be hard to get maps for the US.