Use the IE administration kit and put
www.netstumbler.org and .com in the favorites. Or better yet make it the homepage. Not installed but shows where said buyer can go to download it, join the fourms, and get support. Plus when said buyer installs it, the good green/yellow/red page with the
unsupported lists come up, which is going for averting at least 15 percent of those noobie questions.
Is Knoppix STD redistributable? I'm pretty sure it is. I second the motion on the GPS. I think it was Madhadder that posted an OEM-like Garmin GPS unit called the GPS 12 (the pc version of which includes a serial cable and 12v car charger hard wired.) Only draw back to these is no screen on them to see what kind of lock you have.
Otherwise looks like a solid concept.