Another bit why Android is so cool :-). I was charging my Samsung Galaxy yesterday using the USB cable from my CAR stereo and just thought I should try mounting the SDCard to see what happens.
Well I mounted the SDCard and voila ! the stereo scanned the SDCard in 2 seconds and started playing the songs I had on the SDCard !
Now how cool is that ? No need for some ultra sophisticated ipod/aux connectivity cable/paraphernalia. Very useful indeed.