I know you can get the av kit for the zune that will put out audio and video. I have one attached to home theater and it works well for audio, but the resolution is a little lacking on a 55 inch big screen

. I am thinking of picking one up, hacking my 04 denali and then using the av kit for the input. The only draw back is that i will have to switch the video on each time and I need to hardwire the power in using a usb to 12 volt connection.