Sorry for the late reply. Thank you for your interest.
I am currently busy with my M.A.-thesis, the follow-up on a conference, and preparing for a research trip to Vienna later this month. So, bascially, all is on hiatus at the moment, including collaboration.
But the story pieces that were a problematic are now done and revised (New Years has been very productive); Continuity etc. won't be an issue until I can finish the final two missions, and that's all about implimenting a checkpoint system I can debug (not trying to reinvent the wheel but I like to be able to fix any problems that occur)... and then there is the bonus mission, but that's harly more than playable cinematic...
Please keep an eye out for the campaign. I hope to restart development after my return form Vienna... although there is a re-release happening first