I now have 7 people signed up for my collaborative story, and the intrigue and secretivensss are begining to border on the paranoid.
I've sent information to each of the authors about the background, and each has individual instructions about things to include. Other than that I have no idea what they will write, but the elements I have given each of them should allow me to tie them all together at the end.
It's great fun, though I'm spending as much time on messages and emails as I would on writing it myself!
You can watch the drama unfold at the Aphelion Lettercol.