Nokia seems to be restricting downloads to users with a valid MAC.

Here are the direct download links:

Latest Version (Diablo):
http://tablets-dev.nokia.com/nokia_N...ED_MR0_ARM.bin

v51.3 Stable Version:
http://tablets-dev.nokia.com/nokia_N...ED_MR0_ARM.bin

Torrent Access Link Access Diablo:
https://thepiratebay.org/torrent/451...10_36-5_Diablo

Torrent Magnet Link Access Diablo:
magnet:?xt=urn:btih:EVGZWZIVDB4HN5JFACYPF36QAVIMZH UM

Torrent Access Link Access v51.3 Stable Version:
https://thepiratebay.org/torrent/406...2008_51.3_N810

Torrent Magnet Link Access v51.3 Stable Version:
magnet:?xt=urn:btih:CCLPK23XXVLX6RLAFBTMCTVOSPVSWU BM

NOTE: The flasher in the torrent no longer works. Download the attached flasher-3.0 for flashing the .bin to the N810.