According to David Weber Himself, contracts are in/on the way to produce an Honor Harrington movie and possibly a series, starting with the first novel On Basilisk Station.
I sure hope that this works out. Modern filmmaking has reached the point that this could be done well, and I'd love to see an HH movie. For a while in the early 2000s (2002 - 2003 mainly) ADV was working on an adaptation of Mutineer's Moon, but that never went anywhere, alas. Hopefully this will not die in Development Hell.