I have pics posted of my setup in the 'anything and everything' forum. Do a search for 'finished my gps setup' and it should bring it up.
Has anyone seen the new 'car pcs'? They're tiny computers, roughly the size of a cd/dvd-rom drive from a standard pc. I think something like that would be perfect in a truck. You can also get the full 12v power supplies for them and tie them into the ignition system, and will auto-start/shutdown the computer when you run the truck.
I really like the in-dash unit, but the price is wayyyyyy out of my league for quite awhile. I did play around with the StreetDeck software that's shown on the 2nd link below. It's a great program - it combines many many features into a gps app, including an mp3 player, satelite radio and others.
http://store.mp3car.com/SearchResults.asp?Cat=25
http://store.mp3car.com/ProductDetai...Code=SDK%2D007
http://www.streetdeck.com/