They met him once, and he signed a copy of his latest (and final HHG) book, Mostly Harmless. They are proud that they actually woke him out of his book-signing stupor.
And of course, his best quote (and they know that it is quite a contest) belongs here, for eternity:
Q: Will you ever write another H2G2 book?
A: Five books in a trilogy? Don’t be absurd.