I will point out that we've tried using the 808 keychain camera (or whatever it's called) at nighttime, it does not work very well at all in low lighting conditions. We tried taking onboard 1:10 drifting footage at a school during nighttime, and even with the school's ambient sodium lighting (and the body shell LED's) the video was murky.
I have an SSD in my netbook (old 8.9" Aspire One), and it comes with a webcam that handle darkness ok but the FPS is quite low. If you have a better, external webcam mounted somewhere discreet you can leave a laptop running a video capture program that suits your needs (not sure of any, sorry) elsewhere in the car. Most software-based video capture programs can take video until the hdd is full unless the hdd is FAT filesystem. You don't even need an SSD depending on how smooth your roads are over there...even the basic netbooks come with 160GB hard drives, so unless you're shooting full HD you will have capacity to spare.