Well I found out what was causing the hissing sound with my ipod. I noticed that at first when the car was started the hissing was not there, even though I had the ipod already plugged in. This led me to think that maybe the ipod was trying to do 2 things at once and that maybe that was the background static i was getting. I do have the new ipod video, so I thought let me play around with it and see. Well when I touched the iopd and the backlight came on, guess what NO background STATIC

SO I was like ahh ok, for some reason with my ipod, having the background light off creates some kind of feedback that causes background static when the ipod is playing. Well I set my ipod to have the backlight stay on continuously, and the noise is all gone, problem solved!