That's sounds like an interesting angle Harald. As for the power I was going to run a power and comms bus behind the dvd's with the circuit in the DVD connected to it, thereby there should be no need for a battery. I'll have a look at what the RFID tech can do, see if it can work in reverse...
I have come up with a project that I want to try. I have a lot of dvd's and want to create a selection station based on a microcontroller (yet to be decided). I want to be able to embed a chip in the DVD case with an led indicator attached. The chip then will have a unique ID allocated to it...