I was told to send this email on irc, so here it comes
Yesterday I flashed my Motherboard with Flashrom (first backed up with
-r, then flashed with -w), it worked out of the box. Note that the V2
Version of this Board, that is already listed on your support list, is a
different board and not just a revision (missing SAS, more SATA,
different Audio afaik).
Motherboard Name: ASUS P6T Deluxe
Motherboard Revision: (unknown, my graphics card hides the text and it's
quite difficult to remove it - probably there is only one revision)
Bios flashed from v1904 to v2101
Flashrom Version: 0.9.1
Operating System: Gentoo Linux, Vanilla Kernel 2.6.33
Notes: CONFIG_X86_PAT=y and CONFIG_STRICT_DEVMEM=y
The output of flashrom -V, lspci -nnvvvxxx and superiotool -deV are
linked below, I also attached a file for each of these.
Thanks for the report, the board was marked as supported a while ago,
just doing cleanups here...