Revan died - in one of the old testing relics from cartel packs (before they were pulled for not working half the time) was Revan's mask which summoned his force ghost and would aid you in battle doing X damage, etc.
So unless those relics are completely abandoned, he is dead.
Seriously how can people still claim that he is dead, we argued about this a hundred times already... get your facts straight people. Won't bother to include any arguments, just do some research. :s