Just another question regarding this Skyhook system. I've read through their website, and it seems you need to submit your wifi access point to them in order for it to work.

Then I'm wondering how the system was able to pinpoint my location so accurately, since I'm 100% sure I've NEVER registered anywhere that I've got a Wifi router. I'm pretty sure my neighbours haven't either since they are not really technology savvy. Then how does this system receive its data?
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Riocar 80gig S/N : 010101580 red
Riocar 80gig (010102106) - backup