I submitted this a while ago for ask slashdot, so I figured I'd post it here, in case anyone who reads my journal might be an electronics geek/guru:

I'm a budding electronics geek, trying to build what amounts to an RFID tag and scanner system to act as a homing beacon, but without the unique ID data. I'm looking to have the tag/transmitter be powered by magnetic field generated in an antenna on the device, with the scanner/tracker sending out the signal. An optimal design would include a return frequency differing from the input, very tiny size/mass and a range of up to 50 feet. So far I've been stumped trying to find good information on the internet about how to build my own, so I'm asking all you /. electronics geeks: What are some good resources to check (online, books, schematics)?

Yay! I'm a statistic. Mark me down on the list of people who've had their MasterCard info stolen and used to make fraudulent purchases.

$2,566.07 in Google Adwords purchases no less.
All while in the midst of trying to purchase a home with my wife. Awesome timing. Well, you know all those tips and tricks for avoiding credit and identity theft? Read them all, use 'em.

Going to take weeks to sort this out, I can kiss my finances goodbye.