Not sure if the topic is aging Brun Ancien or old beaujolais in general, so apologies.
I've had only newish Brun, but with Brad's crazy 1992 Jadot from the July 2011 Jeeb, and a still kicking 84 Jadot MaV last spring, i'm afraid i've become a convert. And since few believe in old beaujolais, the pricing tends to be great.
Earlier this year we ran across some 1999 Foillard CdP that was still quite nice. Last week the same source at long last noticed himself in possession of 1995 Henry Fessy Chiroubles Cuvee Peyraud, and 1999 Lapierre et Pacalet (Christophe of course) Brouilly. The brouilly with just a touch of brett was still fresh and light and quite nice even on day 2. I knew absolutely nothing about the Fessy and there was a mountain of sediment to let settle, so I feared it to be DOA. Quite the opposite it had tons of stuffing, lovely dried cherry.
I have multiples of both wines (and a couple of the Foillard still), so i'll hold some back to share with the PacNW crowd in time.