Hey, if you ever get going on this, what would be really cool would be to be able to read PDFs on the AVIC. So, suppose you enter a CD with a PDF file (or files), it would run adobe reader and allow you to navigate around the file(s) using the touch screen.
I have my shop manuals on CDs in PDF format and thought how much easier it would be to read it off the AVIC's screen rather than printing out the page(s) that I need.
All it might take is a small piece of software that would intercept the CD before the pionneer gets it and then runs a PDF viewer if the CD contains PDFs otherwise, it would let the AVIC do it's thing.
"All"! Yeah, no problem. Shouldn't take you more than 1/2 hour! tops! 
Well, put it on the "wishlist"