Interesting article by AdamLechmere on the movement, mostly in France, to preserve ancient grape varieties afore they go extinct:
Preserving Ancient Grape Varieties

Lotta varieties I've not heard of. Obviously, they should be planting these all up&down the Coast of Calif. Calling Bryan Harrington.

A related article by ChristinaPickard on a similar effort in Britan:
Saving British Varieties

Anyway, some interesting reading.