Haven't heard of such a release. Would be intersting to campare the different versions. Do you know what the 3rd would be, Trev?
I like the idea of a voice over, but I found out that it's usually handled rather badly in films. I know some comics were it works fine, but "Sin City" was for me the most recent example of a "bad" noir-voice over.
I could imagine that it would destroy a lot of the atmosphere in Blade Runner, but it could also add something...
Could you say more about your impressions Anasazie?

Btw, this thread is getting bigger and bigger. 
But it seems like only wpqx is currently watching noir films.