I love the idea of doing a really story heavy campaign with developments online, I like the idea of being able to put together a comprehensive story arc worth of a Black Library series
You're talking with the right guys, then. I know almost nothing about the 40K universe & setting, but I enjoy writing naval battle reports, almost as much as Ruckdog loves putting those together.
Most tabletop gamers like to talk about how they split their hobby time and table gaming time, but I split mine into thirds: painting, playing, and writing about playing. If you don't mind me using paper model ships or even some models from another range (I'm working on a Sorylian fleet right now--long, cylindrical ship models, approximating the size and shape of Imperial ships), then I'm definitely in!