In a flash of misguided inspiration I decided to make a 3G based tracking device for my bike. The idea is that the device is fitted discretely with connections only to power and optionally to the fuel pump or engine run, and when the system detects movement while activated it sends a signal to the central site that informs you via mobile phone. There is the option to add a siren, but I think this rather defeats the purpose of a tracker, as the first thing they would do would be to look for the alarm unit to destroy it. The reason I started all this was to add an active RFID unit so the system will activate as I walk away and deactivate when I return, so I'll never forget, and it won't send tracking information or movement detection unless I'm away from the bike. My theory is that the fuel line or ignition disable allows you to stop the bike if it's 'disappeared' without alerting the rider to the fact it's being tracked. Hopefully that causes a thief to abandon the bike, allowing you to locate and retrieve it quickly. It's got a built-in battery, so even if they disconnect the battery it should continue tracking for about 24 hours. I'll just have to make sure I can hide it well, as you don't want it to be located easily in the back of a van when your bike's just been stolen! Does this sound of interest to other people? At this stage I reckon it looks like each device will cost about $190, and I'm hoping a monthly subscription of about $9 would cover the cost of hosting and the 3G card data. I'll be sticking one in the car too in case I forget where I left it Oh, and it does have the option to track your location and speed if you want a record of where you've been, but I'm not sure if that's always a good thing unless you're at a track-day!