Today I got it certified by Amazon's customer service: I bricked my Kindle.
I was trying to install Duokan, something went wrong and the device froze, then after a reset the screen went completely blank (and so it remained ever since)... the green light when you slide the power switch is the only sign of life of my poor kindle now
I think that some file in rootfs got corrupted hence I'm looking for someone to send me an image of the rootfs of a working Kindle 3 wifi to try and repair it. Any help would be really appreciated. Thank you.
Unfortunately I'm still waiting for a serial/usb adapter so I cannot access my device as for now.