I was cruising for a couple for the Toshiba and Sanyo car decks and hit this site. Appliances, TV, Highend home equipment, Dishwashers, Microwaves, and even Ford, Chrysler, GM, Nissan, etc. units: http://fileshare.eshop.bg/index.php
Here's a guy that has done a completely detailed after-market car radio/player install on a Subaru SVX. Better than any Step-by-step install manual. Removal shortcuts, connector problems, wiring issues. Just simply excellent. http://www.geocities.com/svxdc/AudioInstall.htm
Oh yeah! Like you had nothing else to do. How about a full Home Theatre system, connected to the WWW and games machines? Lots of good car systems too! Great pics and wiring diagrams. http://www.lalena.com/Audio/Wiring/Projects.aspx
I'll post this Tech Article here because its all about Car Radio/Stereo wiring, but I'll post it in my 'Electrical Mystery' thread too, because the techniques in it, will work anywhere in a car. http://www.the12volt.com/installbay/forum_posts.asp~TID~74637~PN~1