Hey Scorpion, that's a pretty nice setup you got there. I don't think I'm ready to integrate a computer into my car yet, but maybe in a few years.
This is the adapter I was looking at on ebay:
http://cgi.ebay.com/ws/eBayISAPI.dll...tem=3457712826
My laptop uses 19V @ 3.16 amps which this unit seems able to do so I'm hoping it'll be alright. The inverter on getagps.com also seems like it can handle the job for about the same price, which do you think is a better option?