has covered it well, PKTrekGirl
. Some of the other things we've seen are JMS's notes on some of the proposed episodes and even a very early treatment for Crusade when TNT was being finessed into picking up the fifth season. In the first book we got an early draft of 'The Gathering' which featured Velana, Kosh's mate. Obviously, she was dropped and there were a lot of other changes. There are some amazing stories about the cast and crew (Lyta's Lingerie
, anyone?), loving tributes to Rick Biggs and Andreas Katsulas.
The Scripts Team are the folks who deal with Cafe Press to get the books out and who handle customer service for JMS. Jaclyn is the Captain of the team.
And I'm not trying to sell anybody anything but shortly after the last volume of the B5 series comes out, they'll be going away forever. Volume 13 becomes available on the 23rd and Volume 14 is due out in March. There'll be a 15th volume given free to those who buy the 14 volume set and it's slated to have some very cool things including an outline of the five year arc had Sinclair stayed on.