I'll put here my own research, videos and info about earthworm composting and vermiponics. To start with I show you my first prototype... I have to say that probably I need to buy another waterpump, because It looks like the quantity of water that leaves the bed containers is more than the one that comes in.

http://www.youtube.com/watch?v=s6TVle3kPAI

http://www.youtube.com/watch?v=fv5KMTaW83M