I have a couple gooseneck mounts, Charlie. They're awesome.
I got a dual charger that works with the usb cables so Lisa and I (or my daughter and I) can charge our iPhones or Touches simutaneously.
I also installed an rf modulator setup in the Envoy so I can plug my ipod or phone or touch right into the stereo, because it doesn't have a 5mm jack for aux.
Works great and sounds awesome.
On the app front, I found it fun to run iseismometer while I'm playing tunes over my phone's speaker. Especialy if it's bass-heavy stuff. It's fun.
It's far more geeky than visualizations. Plus Bigfoot can't sneak up on you. That's just and added benefit.
