In Car Computer System

Stick to a good laptop.

Have a look here http://www.bitdistribution.com.au/?stg=49
Damn site cheaper than $2400 from the mob you listed.

There are a few.
Most on the forum seem to have stuck to a laptop for portability and a cheap screen off ebay.

A quick google will get you results-
Xenarc PCs
Gumstix PCs
Gumstix PCs
Alternatively you can build your own with a mini-itx board and case- there are a few manufacturers, try even searching for Media PCs to find similar alternatives.
You can buy standalone 800Mhz systems I have seen with all the standard PC connections and they are about the size of 2 cigarette packets, but they have no CD rom (you'd have to use USB everything). A CDMA USB modem is the cheapest option for web access out of the metro area, but they have no external aerial plug so range is limited. The PCMCIA ones I saw telstra doing trials of had the external connector but all that seems to be around now are the USB WiMax units.
I hear there are wireless broadband companies around but im out in the bush and cant help on those.

Decide where it will go- that will decide the price. Under the seat- A mini ATX case will save you a few hundred off a micro/mini ITX, but they are bigger. If it is in the dash, look at fanless units or ones that have an external power regulator so heat is at a minimum. Keep in mind a car can get 60 degrees, and most PC parts bleep themselves at 50.

I think someone is plugging there own product , you dont drive a white nissan do you ? like the one in the demo section of the site you sent us to ? lol

Hey Jafhar,

check out www.gpsaustralia.com. A number of in car pc setups there with plenty of pics.

cheers,
98jack