Brains from respawned players are viable for borging.

[Camnui]

Oh Jesus this is the stuff from nightmares

The circumstances where it worked were pretty specific, but I only posted about it because of the horrible chance it'd work with wizards using soulguard.

woulda sworn soulguard vaporized the body, unless you're talking about the very specific circumstance of the brain being removed while they're still alive.