thanks to kcrw's "good food" podcast on raw cheeses, i learned:
cheeses enriched with buttermilk have lactose.
BUT hard cheese has zero lactose.
some medium cheese also has zero lactose.
and some people who are lactose intolerant might just be intolerant of cow's milk, but not sheep's or goat's.
(but no matter what, i eat cheese, so perhaps it doesn't make much of a difference.)