New guy here, so please excuse me if I display my ignorance of the project!
OK, so if you're doing Dirk Gently books, the first one being in production at the moment (haven't had time to listen yet. Sorry

) And in another it was mentioned that The Long Dark Teatime of the Soul would be the next main project.
So, here's my idea, after that why not do the Salmon of Doubt? I know it finishes half-way, but through the hints that Adams gave his publisher and the existing eleven chapters, it shouldn't be too hard to find something servicable plot-wise to then hand over to people cleverer than I dialouge-wise. I mean, hints are dropped in the early chapters so cleverly you can guess at certain elements.
Writing our own half of an Adams book might seem a little disrespectful, but in no way is it planned to say what
would have happened, but if we make something people enjoy, I'm sure Douglas wouldn't object!
Thoughts, comments, abuse?