I recently stumbled across the blog of someone who has been working in the Visual effects field for some time. He currently is working on Battlestar Galactica. Anyway, recently he has posted two posts (with the promise of more) on being around at the early days of production of B5.

They are-

Building The Central Corridor

The Forgotten Miniature

Both feature some amazing, never before seen, behind the scenes photos. Each post is also a glimpse behind the scenes from a viewpoint I don't think we've had before.