Looking for stories about tracking kids via GPS devices

Hi everybody, I'm a student at the Journalism School at Columbia, and I'm writing an article about the latest technology (like the Zoombak, Little Buddy devices) that allows parents to keep tabs on their kids via GPS tracking. I was wondering if anyone has had experience with these products and might be willing to talk to me about it for a few minutes in an interview. If you are interested, please contact me at [email hidden]

Thanks very much!
-Lauren Kirchner