RFID - It's all the rage as of late and you hear about it everywhere. To those who don't know, it's basically like a GPS, to put it simply. My question is...is this a reality yet? I have so much I really don't know what to believe or where I can believe it. I am looking to get some type of device that is small and I can hide in my backpack, therefore if it gets stolen, I (or police) can track it because I had some kind of RFID tag or device that was hidden in it. I think I could also check its status from my Mac. I know that is what Wheels Of Zeus (The Woz's company) but I don't really see any consumer product right now, or coming out soon... So, anyone have any ideas for a device that could help me?