Browse to https://www.orangegadgets.com/shop/product_...2&products_id=1

I bought one for about RM350 (incl. shipping) if I'm not mistaken. I prefer this to TomTom car kit because it's much smaller, and you can carry it anywhere. I use it with my Ipod Touch to track my jogging distance.

You must jailbreak your Ipod Touch to use this. Install a software called GPSSerial from Cydia. You should be able to use any GPS app from App Store except Google Maps default app. I use Sygic & Papago on my Ipod Touch 1G. In terms of GPS response and accuracy, it's at least as good as IPhone 3GS.

Since Ipod Touch 2G has Bluetooth, another possible way to use GPS is to use Bluetooth GPS receiver eg Holux. Use RoqyGPS app :

http://www.roqy-bluetooth.net/roqyGPS.html